Protocol Buffers - Google's data interchange format

The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)

Scriptable Headless Browser

A library that provides an embeddable, persistent key-value store for fast storage.

The open-source database for the realtime web.

The MongoDB Database

Emscripten: An LLVM-to-WebAssembly Compiler

Cloud-native high-performance edge/middle/service proxy

FlatBuffers: Memory Efficient Serialization Library

KeePassXC is a cross-platform community-driven port of the Windows application “Keepass Password Safe”.

Ceph is a distributed object, block, and file storage platform

Arduino core for the ESP32

A Multithreaded Fork of Redis

Automatic License Plate Recognition library

ZeroMQ core engine in C++, implements ZMTP/3.1

ESP8266 WiFi Connection manager with web captive portal

The FastLED library for colored LED animation on Arduino. Please direct questions/requests for help to the FastLED Reddit community: http://fastled.io/r We'd like to use github "issues" just for tr…

Apache Mesos

Automatic PageSpeed optimization module for Nginx

Fiber/coroutine support for v8 and node.

Easy MultiSensor device based on ESP8266/ESP32

Arduino library for controlling single-wire LED pixels (NeoPixel, WS2812, etc.)

Home automation firmware for ESP8266-based devices

Facebook's branch of Apache Thrift, including a new C++ server.

Embedded Template Library

OSI Layer 2 driver for nRF24L01 on Arduino & Raspberry Pi/Linux Devices

SwiftShader is a high-performance CPU-based implementation of the Vulkan graphics API. Its goal is to provide hardware independence for advanced 3D graphics.

Kythe is a pluggable, (mostly) language-agnostic ecosystem for building tools that work with code.

Hosting node.js applications in IIS on Windows