Best Application Development Software for IntelliJ IDEA

JetBrains Junie is an innovative AI coding assistant that works inside many JetBrains IDEs to streamline programming efforts and boost efficiency. This agent leverages advanced AI to help developers write, test, and inspect code without leaving their familiar development environment. Junie offers both code execution and interactive collaboration, allowing programmers to switch between automated code writing and brainstorming sessions for features and improvements. By deeply understanding the codebase, Junie identifies the best ways to tackle tasks and ensures all changes meet quality standards through syntax and semantic checks. It also runs tests to minimize errors and keep the project healthy, freeing developers from routine tasks. Many developers have successfully built complex applications and games using Junie, highlighting its flexibility across different languages and frameworks. The AI adapts to each task’s complexity and workflow, making coding less tedious and more focused on creativity. Whether you are building a simple web app or a complex game, Junie offers smart support throughout the development cycle.

ZeroPath (YC S24) is an AI-native application security platform that delivers comprehensive code protection beyond traditional SAST. Founded by security engineers from Tesla and Google, ZeroPath combines large language models with deep program analysis to deliver intelligent security testing that finds real vulnerabilities while dramatically reducing false positives. Unlike traditional SAST tools that rely on pattern matching, ZeroPath understands code context, business logic, and developer intent. This enables identification of sophisticated security issues including business logic flaws, broken authentication, authorization bypasses, and complex dependency vulnerabilities. Our comprehensive security suite covers the application security lifecycle: 1. AI-powered SAST 2. Software Composition Analysis with reachability analysis 3. Secrets detection and validation 4. Infrastructure as Code scanning 5. Automated PR reviews 6. Automated patch generation and more... ZeroPath integrates seamlessly with GitHub, GitLab, Bitbucket, Azure DevOps and many more. The platform handles codebases with millions of lines across Python, JavaScript, TypeScript, Java, Go, Ruby, Rust, PHP, Kotlin and more. Our research team has been successful in finding vulnerabilities like critical account takeover in better-auth (CVE-2025-61928, 300k+ weekly downloads), identifying 170+ verified bugs in curl, and discovering 0-days in production systems at Netflix, Hulu, and Salesforce. Trusted by 750+ companies and performing 200k+ code scans monthly.

Docker streamlines tedious configuration processes and is utilized across the entire development lifecycle, facilitating swift, simple, and portable application creation on both desktop and cloud platforms. Its all-encompassing platform features user interfaces, command-line tools, application programming interfaces, and security measures designed to function cohesively throughout the application delivery process. Jumpstart your programming efforts by utilizing Docker images to craft your own distinct applications on both Windows and Mac systems. With Docker Compose, you can build multi-container applications effortlessly. Furthermore, it seamlessly integrates with tools you already use in your development workflow, such as VS Code, CircleCI, and GitHub. You can package your applications as portable container images, ensuring they operate uniformly across various environments, from on-premises Kubernetes to AWS ECS, Azure ACI, Google GKE, and beyond. Additionally, Docker provides access to trusted content, including official Docker images and those from verified publishers, ensuring quality and reliability in your application development journey. This versatility and integration make Docker an invaluable asset for developers aiming to enhance their productivity and efficiency.

Kubernetes (K8s) is a powerful open-source platform designed to automate the deployment, scaling, and management of applications that are containerized. By organizing containers into manageable groups, it simplifies the processes of application management and discovery. Drawing from over 15 years of experience in handling production workloads at Google, Kubernetes also incorporates the best practices and innovative ideas from the wider community. Built on the same foundational principles that enable Google to efficiently manage billions of containers weekly, it allows for scaling without necessitating an increase in operational personnel. Whether you are developing locally or operating a large-scale enterprise, Kubernetes adapts to your needs, providing reliable and seamless application delivery regardless of complexity. Moreover, being open-source, Kubernetes offers the flexibility to leverage on-premises, hybrid, or public cloud environments, facilitating easy migration of workloads to the most suitable infrastructure. This adaptability not only enhances operational efficiency but also empowers organizations to respond swiftly to changing demands in their environments.

GitHub stands as the leading platform for developers globally, renowned for its security, scalability, and community appreciation. By joining the ranks of millions of developers and businesses, you can contribute to the software that drives the world forward. Collaborate within the most inventive communities, all while utilizing our top-tier tools, support, and services. If you're overseeing various contributors, take advantage of our free GitHub Team for Open Source option. Additionally, GitHub Sponsors is available to assist in financing your projects. We're thrilled to announce the return of The Pack, where we’ve teamed up to provide students and educators with complimentary access to premier developer tools throughout the academic year and beyond. Furthermore, if you work for a recognized nonprofit, association, or a 501(c)(3), we offer a discounted Organization account to support your mission. With these offerings, GitHub continues to empower diverse users in their software development journeys.

Git is a powerful and freely available distributed version control system that is built to manage projects of any size swiftly and effectively. Its user-friendly nature and minimal resource requirements contribute to its remarkable speed. Git surpasses traditional source control management tools such as Subversion, CVS, Perforce, and ClearCase by offering advantages like inexpensive local branching, user-friendly staging areas, and diverse workflow options. Additionally, you can interact with configurations through this command, where the name represents the section and the key separated by a dot, while the value is appropriately escaped. This versatility in handling version control makes Git an essential tool for developers and teams alike.

GitHub Copilot represents the next evolution of intelligent software development, combining AI-driven coding, collaboration, and automation in a single ecosystem. It seamlessly integrates with GitHub and leading IDEs, transforming natural language prompts into working code, tests, and documentation. The new Agent Mode allows developers to delegate tasks—Copilot autonomously writes, executes, and validates code using GitHub Actions, delivering ready-to-review pull requests. Developers can interact through Copilot Chat, switch between models like GPT-5, Claude Sonnet 4, and Gemini 2.0 Flash, and refine results with contextual feedback. Next Edit Suggestions and automated code review ensure project-wide consistency, helping teams catch bugs before they reach production. With Copilot Spaces, teams can organize shared context—code, notes, and knowledge—to produce tailored, high-quality results. Available in Free, Pro, and Pro+ plans, Copilot scales from individuals to enterprises with flexible model access and premium capabilities. Ultimately, GitHub Copilot transforms development from manual iteration to AI-augmented collaboration, enabling engineers to focus on innovation instead of boilerplate.

Welcome to the world of Subversion, the digital home of the Apache® Subversion® software initiative. Subversion serves as an open-source version control system that has gained immense popularity since its establishment in 2000 by CollabNet, Inc. Over the past ten years, the Subversion project and its software have achieved remarkable success. The tool has been widely embraced not only in the open-source community but also among businesses and organizations. Developed under the auspices of the Apache Software Foundation, Subversion benefits from a vibrant community of developers and users who contribute to its ongoing improvements. We are constantly seeking individuals with diverse skill sets to join us in enhancing Apache Subversion. The goal of Subversion is to be universally recognized as an open-source, centralized version control system, prized for its dependable nature as a secure repository for critical data, the ease of its model and application, and its capacity to cater to the diverse requirements of various users and projects. With an ever-growing user base, Subversion continues to evolve to meet the changing needs of its community.

React simplifies the process of building interactive user interfaces by allowing developers to design straightforward views for each state of their application. When your data changes, React intelligently updates and renders only the components that need to be altered, ensuring efficiency. The use of declarative views contributes to a more predictable coding experience and facilitates debugging. You can create self-contained components that maintain their own state and combine them to construct intricate UIs. Since the logic for these components is implemented in JavaScript rather than templates, it allows for seamless data transfer throughout the application while keeping the state separate from the DOM. React does not impose restrictions on your technology stack, enabling you to introduce new features in React without the necessity of overhauling your existing codebase. Each React component features a render() method that accepts input data and determines what should be displayed. This particular example employs an XML-like syntax known as JSX, and the input data provided to the component can be accessed through this.props within the render() method. Overall, this flexibility makes React a powerful tool for modern web development.

JUnit 5 represents the evolution of the JUnit framework, aiming to establish a modern foundation for testing on the JVM that caters to developers. It emphasizes compatibility with Java 8 and later versions while also supporting various testing methodologies. We encourage our users to back our efforts, as your contributions would allow us to maintain momentum. Our commitment to JUnit will persist, regardless of the level of financial support we receive, but additional backing would enable us to concentrate our efforts more effectively rather than just working on it during our free time. For instance, we aspire to hold regular meetings and collaborate closely for several days, which would facilitate quicker progress through in-person design and coding sessions. By contributing, you can help turn this vision into a reality while enhancing the overall development process!

Selenium enables the automation of web browsers, and the possibilities it presents are entirely in your hands. While its primary use is for testing web applications, its utility extends well beyond that scope. Repetitive web-based administrative tasks can also be automated effectively, making your workflow more efficient and less tedious. For those looking to develop comprehensive browser-based regression automation suites and distribute scripts across various environments, Selenium WebDriver is the ideal choice, offering a set of language-specific bindings to control a browser as intended. Alternatively, if you are interested in quickly creating bug reproduction scripts or enhancing exploratory testing through automation, Selenium IDE serves as a convenient tool; this is a browser add-on for Chrome and Firefox that provides straightforward record-and-playback functionality for user interactions. Furthermore, if your goal involves scaling your testing processes by executing tests across multiple machines and managing diverse environments from a centralized interface, Selenium can accommodate those needs as well. Ultimately, the versatility of Selenium allows for a broad range of automation possibilities tailored to fit various requirements.

Discover an effective method for creating applications using Angular that allows you to leverage your code and skills for multiple deployment platforms, including web, mobile web, native mobile, and native desktop. Experience optimal performance on the Web Platform today and enhance it further through the use of Web Workers and server-side rendering techniques. Angular empowers you to manage scalability effectively, enabling you to meet substantial data needs by constructing data models with tools like RxJS, Immutable.js, or other push-based frameworks. Quickly develop features using straightforward, declarative templates, while also having the ability to expand the template language by incorporating your own components alongside a diverse selection of pre-existing ones. Gain immediate Angular-specific assistance and feedback across nearly all integrated development environments and text editors. This cohesive approach ensures that you can prioritize crafting exceptional applications instead of grappling with code issues. Ultimately, from initial prototype to widespread deployment, Angular provides the productivity and scalable framework necessary to support some of Google's largest applications, ensuring your projects can grow seamlessly.

The Java™ Programming Language is designed as a versatile, concurrent, and strongly typed object-oriented language that utilizes a class-based structure. Typically, it is translated into bytecode that adheres to the specifications laid out in the Java Virtual Machine Specification. In this language, developers write source code in standard text files that conclude with the .java suffix. These source files are subsequently transformed into .class files through the use of the javac compiler. Unlike native processor code, a .class file comprises bytecodes, which serve as the machine language understood by the Java Virtual Machine (Java VM). To execute an application, the java launcher tool creates an instance of the Java Virtual Machine, allowing the compiled bytecode to run seamlessly. This process exemplifies the efficiency and portability that Java offers across various computing environments.

Vue is a JavaScript framework designed for creating user interfaces, enhancing the typical use of HTML, CSS, and JavaScript with an intuitive API and exceptional documentation. It features a truly reactive rendering system optimized by a compiler, which minimizes the need for manual performance tweaks. Moreover, Vue offers a robust and incrementally adoptable ecosystem that seamlessly transitions from a simple library to a comprehensive framework. This framework employs a declarative and component-based programming approach, allowing developers to build user interfaces efficiently, regardless of their complexity. By extending standard HTML with a unique template syntax, Vue enables developers to express HTML output in relation to JavaScript state seamlessly. Additionally, it intelligently monitors changes in JavaScript state and updates the DOM accordingly, ensuring optimal performance. Overall, Vue represents a complete framework and ecosystem that encompasses nearly all the essential functionalities required for frontend development, making it a versatile choice for developers.

vStellar is an all-in-one automated software testing platform designed to accelerate QA processes through a low-code framework that eliminates repetitive manual testing. With comprehensive support for UI, API, mobile, performance, and accessibility testing, it provides a unified solution for complex testing environments. The platform integrates directly with IntelliJ IDEA, allowing users to install a lightweight plugin and begin creating and executing test cases instantly. Teams can define locators, endpoints, and execution parameters visually, then run unlimited test cases with advanced parallelization. Built-in reporting dashboards offer real-time visibility into test results and system performance, while CI/CD integration ensures continuous quality validation during deployments. vStellar’s flexibility supports diverse environments and browsers, enabling consistent validation across platforms and devices. Companies leverage it to reduce QA effort, accelerate release cycles, and enhance overall reliability. With its combination of ease of use and technical depth, vStellar redefines how teams automate testing at scale.

At npm, Inc., we are the driving force behind the Node package manager, the npm Registry, and the npm CLI, which we provide to the community at no cost. While our primary objective is to support developers by creating and marketing valuable tools, users can start for free or upgrade to npm Pro for an enhanced JavaScript development experience that includes features such as private packages. We aim to bring the best of open-source solutions to individuals, teams, and organizations, and our services are trusted by over 11 million developers globally, underscoring our commitment to making JavaScript development both elegant and secure. The npm Registry has emerged as a pivotal hub for JavaScript code sharing, boasting over one million packages, thus becoming the largest software registry available. Our additional tools and services elevate the use of the Registry and enhance your development efforts. At npm, Inc., we take pride in having dedicated teams of full-time professionals focused on maintaining the npm Registry, refining the CLI, bolstering JavaScript security, and pursuing various innovative projects to further support our user community. This commitment ensures that we continually meet the evolving needs of developers around the world.

Cascading Style Sheets, commonly known as CSS, serve as a style sheet language that web developers employ to organize the structure of HTML and other components within a website. Renowned for its prevalence, CSS ranks among the most widely utilized languages across the Internet. It is crucial for style sheets to function effectively that your markup remains free of mistakes. To conveniently rectify markup errors, utilizing a tool like HTML Tidy can be beneficial. This utility not only cleans up the markup but also enhances its readability and ease of editing. I highly suggest that you frequently apply Tidy to any markup you are working on, as it proves to be highly effective in refining content generated by authoring tools that might have inconsistent practices. Each style property is initiated by the property's name, followed by a colon, and then the designated value for that property. When listing multiple style properties, it’s necessary to separate each one with a semicolon to clearly distinguish one from another. In essence, adopting best practices with tools like Tidy can significantly streamline the process of web development and improve overall code quality.

Kotlin is designed for ease of use, allowing you to develop robust applications right from the start. It seamlessly integrates with the Java ecosystem, enabling you to leverage your preferred JVM frameworks and libraries. You can share your application logic across web, mobile, and desktop platforms while ensuring a native experience for users. This approach not only saves time but also provides unlimited access to platform-specific features. Kotlin boasts strong community support and a rapidly expanding global network of contributors. With an extensive ecosystem filled with various community libraries, assistance is readily available—whether through community resources or direct inquiries to the Kotlin team. For mobile app development on both iOS and Android, Kotlin Multiplatform Mobile serves as an SDK, merging the advantages of cross-platform and native application creation. By maintaining a unified codebase for essential components like networking, data storage, and analytics, you can streamline the development process for your Android and iOS applications. This ultimately enhances productivity and fosters innovation in your projects.

TypeScript introduces enhanced syntax to JavaScript, facilitating a more seamless connection with your development environment. This allows for early detection of errors within the editor. The code written in TypeScript is ultimately transformed into JavaScript, making it executable in various environments, including web browsers, Node.js, Deno, and mobile applications. With its capability to comprehend JavaScript, TypeScript employs type inference, enabling excellent tooling while minimizing the need for additional coding. In the 2020 State of JS survey, 78% of respondents reported using TypeScript, with a remarkable 93% expressing their intention to continue its use. The prevalent type of mistakes made by developers are often categorized as type errors, where an unexpected value type is encountered in a given context. Such errors can stem from trivial mistakes like typos, misunderstandings of a library's API, incorrect assumptions regarding runtime behavior, or other forms of oversight. Ultimately, utilizing TypeScript can significantly enhance code quality and developer productivity by reducing these common pitfalls.

Apache Groovy is an immensely versatile language that offers optional typing and dynamic capabilities, along with the option for static typing and compilation, designed for the Java ecosystem to enhance developer efficiency through its succinct, familiar, and accessible syntax. It seamlessly integrates with any Java application, providing a wealth of features such as scripting abilities, the creation of Domain-Specific Languages (DSLs), both runtime and compile-time meta-programming, as well as functional programming options. Its syntax is not only concise and expressive but also straightforward for Java programmers to pick up. Key features include closures, builders, versatile meta-programming, type inference, and static compilation. With a flexible and adaptable syntax, Groovy comes equipped with advanced integration and customization tools, making it easy to incorporate clear business rules into your software. It is particularly effective for crafting concise and maintainable test cases, in addition to streamlining various build and automation processes, thereby solidifying its role as an essential tool for developers. Overall, Groovy's capabilities make it an ideal choice for enhancing both productivity and code readability in Java-based projects.

Markdown enables users to compose content in a straightforward, readable format that can be easily transformed into valid XHTML or HTML. Essentially, "Markdown" refers to two components: (1) a syntax for plain text formatting and (2) a Perl-based software tool that converts this formatted text into HTML. For more information regarding Markdown's formatting syntax, you can refer to the Syntax page. Additionally, you can experiment with it immediately through the online Dingus tool. The primary objective of Markdown’s formatting syntax is to ensure maximum readability, allowing documents to be presented in plain text without the appearance of tags or formatting cues. Although Markdown's syntax draws from various existing text-to-HTML converters, its most significant inspiration stems from the structure of plain text emails. This unique blend of simplicity and functionality makes Markdown a popular choice among writers and developers alike, enhancing their ability to create formatted content effortlessly.

Helidon is an open-source suite of Java libraries tailored for developing microservices, utilizing a high-performance web core that is driven by Netty. The introduction of Helidon Níma marks the first Java microservices framework that leverages virtual threads to enhance performance. With a focus on user-friendliness, Helidon offers comprehensive tooling and a variety of examples to facilitate a swift onboarding process. Since it is essentially a collection of Java libraries operating on a rapid Netty core, Helidon avoids unnecessary overhead or bloat. It fully supports MicroProfile and includes well-known APIs such as JAX-RS, CDI, and JSON-P/B. The Helidon Reactive WebServer serves as the backbone for our implementation, boasting a contemporary functional programming model that sits atop Netty. This lightweight, adaptable, and reactive web server provides an efficient and straightforward base for your microservices. In addition, Helidon comes equipped with essential features like health checks, metrics, tracing, and fault tolerance, ensuring you have all the necessary tools to build cloud-ready applications that seamlessly integrate with systems like Prometheus and Jaeger/Zipkin. Overall, Helidon's capabilities and performance make it an ideal choice for developers looking to create efficient and scalable cloud-native applications.

Duckly is a plugin that allows developers to communicate and collaborate on code in real time, regardless of the IDE they are using. This tool enhances the coding experience by enabling users to share their code, terminal sessions, and local servers seamlessly, while also facilitating audio and video communication within the integrated development environment. With a focus on security, all connections are peer-to-peer and encrypted end-to-end, making it a safe option for collaboration. By combining these capabilities, Duckly simplifies pair programming, code review processes, and overall team collaboration, ultimately boosting productivity and minimizing reliance on additional tools. Users can engage in audio and video discussions and share their screens directly in the IDE, allowing for efficient teamwork and immediate feedback on coding projects. Furthermore, developers can effortlessly share their local servers with teammates, enabling them to observe real-time changes as they occur. This innovative approach fosters a more connected and interactive coding environment among team members.

An IDE plugin designed for real-time collaborative editing caters to the needs of distributed software development teams. It is compatible with both Eclipse and IntelliJ IDEA, allowing various developers to work together simultaneously on shared projects while each individual maintains a locally synchronized version of the project. This tool boasts several key features, such as the ability for multiple developers to edit concurrently, a follow-mode that enables users to track the navigation and editing actions of their teammates, and awareness information that shows recent contributions and current selections from all collaborators. Saros supports collaborative sessions involving up to five participants and provides the option for users to set up their own servers, ensuring that all communication remains within their organization's network. This innovative design significantly enhances the experience of collaborative coding, making it ideal for activities like pair programming, code reviews, and mentoring. Additionally, it allows teams to efficiently coordinate their efforts, ultimately leading to improved productivity and code quality.

Latta AI is a cutting-edge platform aimed at optimizing the software development workflow through automated bug detection and resolution. By capturing user sessions and employing AI-based solutions, Latta AI empowers developers, project managers, and testers to concentrate on creating new features, which ultimately enhances productivity and speeds up release timelines. The platform is designed to integrate effortlessly with widely-used version control systems such as GitHub and GitLab while ensuring robust security measures to safeguard code integrity and confidentiality. In addition, Latta AI provides a plugin for JetBrains IDEs, which permits developers to utilize its bug-fixing capabilities directly within their coding environment. This seamless integration allows for rapid identification and resolution of problems without having to exit the IDE. Furthermore, Latta AI's objective is to cut down the time developers dedicate to debugging by as much as 40%, significantly improving overall efficiency and enabling teams to prioritize innovation and creativity in their projects. By minimizing the burden of bug fixing, Latta AI plays a crucial role in transforming the software development landscape.