MPLAB® Harmony v3 is a comprehensive framework designed for embedded software development, offering a range of flexible and interoperable software modules that aim to streamline the creation of enhanced features while expediting product launches. This framework is core-agnostic, providing support for both MIPS® and Arm® Cortex® core architectures, thereby ensuring code portability through consistent APIs applicable across various device families. The MPLAB Harmony Configurator’s (MHC’s) Graphical User Interface (GUI) allows for straightforward configuration, making it user-friendly. It has been validated for compatibility with 32-bit PIC® (MIPS-based) and SAM (Arm Cortex-based) MCU and MPU device families, ensuring robust performance. Additionally, it seamlessly integrates with third-party solutions such as FreeRTOS and Micrium®, and it can import projects developed in IAR Embedded Workbench. The latest version introduces support for SAM families of Arm Cortex-M based devices, complemented by a free software development environment. Furthermore, the graphical configuration features offered by MHC’s GUI facilitate easy setup of devices and libraries, enhancing the overall development experience. This combination of features makes MPLAB Harmony v3 a powerful tool for developers aiming to maximize efficiency and minimize time-to-market for their products.