ESP-DASH is a C++ library that generates real-time web dashboards on ESP32 and RP2040 microcontrollers, requiring no frontend code and working fully offline.
Cheapino uses a Japanese duplex matrix to run a split 36-key keyboard on a single RP2040 MCU, cutting wiring complexity and cost. Open-source design with QMK/Vial firmware.
OpenDeck uses Zephyr RTOS and a web configurator to enable no-code MIDI controller firmware across multiple MCUs, supporting extensive I/O and MIDI features with cross-board compatibility.