An Open Source Machine Learning Framework for Everyone

Bitcoin Core integration/staging tree

qBittorrent BitTorrent client

Windows Calculator: A simple yet powerful calculator that ships with Windows

Official source code of FreeCAD, a free and opensource multiplatform 3D parametric modeler.

📚 Modern C++ Tutorial: C++11/14/17/20 On the Fly | https://changkun.de/modern-cpp/

Haptic input knob with software-defined endstops and virtual detents

Control WS2812B and many more types of digital RGB LEDs with an ESP32 over WiFi!

Marlin is a firmware for RepRap 3D printers optimized for both 8 and 32 bit microcontrollers. Marlin supports all common platforms. Many commercial 3D printers come with Marlin installed. Check wit…

ESP8266 core for Arduino

Arduino core for the ESP32

ArduPlane, ArduCopter, ArduRover, ArduSub source

Xournal++ is a handwriting notetaking software with PDF annotation support. Written in C++ with GTK3, supporting Linux (e.g. Ubuntu, Debian, Arch, SUSE), macOS and Windows 10. Supports pen input fr…

ESPHome is a system to control your ESP32, ESP8266, BK72xx, RP2040 by simple yet powerful configuration files and control them remotely through Home Automation systems.

MAME

OpenSCAD - The Programmers Solid 3D CAD Modeller

Free open-source non-linear video editor

Easy to use device for connecting "old" measuring units (water, power, gas, ...) to the digital world

The official firmware for Meshtastic, an open-source, off-grid mesh communication system.

📟 JSON library for Arduino and embedded C++. Simple and efficient.

Cross-Platform C++ GUI Library

Asio C++ Library

Cross-Platform SDR Software

LibreCAD is a cross-platform 2D CAD program written in C++17. It can read DXF/DWG files and can write DXF/PDF/SVG files. It supports point/line/circle/ellipse/parabola/spline primitives. The user i…

The open source mesh processing system

mlpack: a fast, header-only C++ machine learning library

I2C device library collection for AVR/Arduino or other C++-based MCUs

Async Web Server for ESP8266 and ESP32

A client library for the Arduino Ethernet Shield that provides support for MQTT.

MQTT gateway for ESP8266 or ESP32 with bidirectional 433mhz/315mhz/868mhz, Infrared communications, BLE, Bluetooth, beacons detection, mi flora, mi jia, LYWSD02, LYWSD03MMC, Mi Scale, TPMS, BBQ the…