
SurveyJS is a set of four open-source JavaScript libraries that offer the benefits of a tailor-made in-house survey application, while considerably reducing the time and resources needed to deploy the system. These libraries are independent of specific server code or database requirements and seamlessly integrate with popular JavaScript frameworks, including React, Angular, Vue.js, jQuery, Knockout, and more. They are designed to communicate with any server that can handle JSON requests, ensuring compatibility with various server architectures and databases.
The product family is composed of:
- An open-source MIT-licensed rendering library that renders dynamic JSON-based forms in your web application, and collects responses.
- A self-hosted drag & drop form builder that features an integrated CSS-based theme editor and a GUI for conditional rules. It automatically generates JSON definitions (schemas) of your forms in real time.
- PDF Generator, a library that renders SurveyJS surveys and forms as PDF files in a browser;
- The Dashboard library that allows you to simplify survey data analysis with interactive and customizable charts and tables.
Visit our website to try out and evaluate our full-scale demo for free.
Learn more

LeaseAccounting.app is a self-serve IFRS 16 and FRS 102 lease accounting platform built for finance teams who want audit-ready compliance without spreadsheets, implementation consultants, or six-figure setup costs. Made by ZenTreasury Oy in Helsinki, Finland with EU-only data hosting. Designed for SMEs reporting under IFRS 16 or FRS 102 (UK GAAP), typically managing 5 to 50 leases. The platform generates complete lease schedules, journal entries, modifications, remeasurements, terminations, and one-click audit evidence packs from any lease contract. AI-assisted contract extraction reads your PDFs and proposes lease terms with confidence scoring; you approve, and the deterministic calculation engine produces the numbers. Same inputs, same outputs, every time. Zen AI is advisory only and never touches a calculation. Other features: Discount Rate Advisor pulls reference rates from central bank sources and drafts a rate memo for review; continuous compliance monitoring flags indexations due, expiring leases, and overdue reassessments; multi-entity bookkeeping from day one; auditor portal access with activity logging (coming soon); journal export to SAP, Oracle, Dynamics, and NetSuite formats; Azure AD / Entra ID SSO with JIT provisioning. Pricing: free tier covers 2 leases with no credit card required. Paid plans start at €149 per month with no per-seat pricing and generous team access included on every tier. Differentiation: built IFRS-first (not ASC 842-first), EU-hosted, fully implemented FRS 102, and self-serve onboarding. The trusted alternative to spreadsheet-based compliance and consultant-heavy enterprise lease tools.
Learn more
Interactive Mathematics
Interactive Mathematics is dedicated to sparking interest and educating individuals about the wonders of mathematics. It achieves this by offering straightforward examples, connecting concepts to real-life situations, and featuring interactive applets that enable users to delve into mathematical ideas. Annually, it assists over 5 million students who access our free lessons to excel in math. Building on that foundation, we have integrated our expertise with AI to launch a complimentary AI math problem solver and tutoring chat platform. This innovation merges a robust mathematical computational engine with advanced artificial intelligence to deliver a cutting-edge math problem solver and calculator. It surpasses ChatGPT in accuracy, outperforms traditional calculators in capability, and provides quicker responses than a human tutor! From complex word problems to algebraic equations and intricate calculus, our AI math problem solver and calculator can tackle it all. Additionally, our solver is adept at interpreting mathematical word problems and discerning the necessary mathematical operations to apply. This multifaceted approach not only enhances learning but also empowers students to develop a deeper understanding of math.
Learn more
MathML Kit
MathML Kit allows you to place MathML files natively without any additional conversions. It allows you to import math equations into Adobe InDesign CC Server and Adobe InDesign.
Major browsers support this format. However, MathML equations should not be printed. Instead, they should be converted to vector (EPS or pdf) or raster formats. Images that are not formatted in this way lose quality and are difficult to maintain. Our solution allows you to insert MathML formulas manually or automatically into InDesign documents and produce high-quality HQ prints.
We support the following Adobe products : Adobe InDesign support CS6 - CC2018. Adobe InDesign Server support CS6 - CC2018. Adobe InCopy support, CS6- CC2018. Extended support for MathML 2.0 presentation. Basic support for MathML 2.0 content. MathML 3.0 basic assistance.
This solution is not for editing, but is primarily for high-quality printing. Customization available upon request.
Learn more