An Open Source Machine Learning Framework for Everyone

Build cross-platform desktop apps with JavaScript, HTML, and CSS

Godot Engine – Multi-platform 2D and 3D game engine

The Swift Programming Language

Protocol Buffers - Google's data interchange format

Tesseract Open Source OCR Engine (main repository)

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

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

An open-source C++ library developed and used at Facebook.

The MongoDB Database

Fast C++ logging library.

Solidity, the Smart Contract Programming Language

FlatBuffers: Memory Efficient Serialization Library

SQL powered operating system instrumentation, monitoring, and analytics.

A modern, C++-native, test framework for unit-tests, TDD and BDD - using C++14, C++17 and later (C++11 support is in v2.x branch, and C++03 on the Catch1.x branch)

Cocos2d-x is a suite of open-source, cross-platform, game-development tools utilized by millions of developers across the globe. Its core has evolved to serve as the foundation for Cocos Creator 1.…

Abseil Common Libraries (C++)

Dolphin is a GameCube / Wii emulator, allowing you to play games for these two platforms on PC with improvements.

Mobile Shell

Offline documentation browser inspired by Dash

Cap'n Proto serialization/RPC system - core tools and C++ library

Flexible level editor

Apache Thrift

TrinityCore Open Source MMO Framework (master = 11.1.0.59570, 3.3.5 = 3.3.5a.12340, cata classic = 4.4.1.59069)

Record and Replay Framework

A microbenchmark support library

High performance server-side application framework

Source for the TechEmpower Framework Benchmarks project

C++ implementation of the Google logging module

Guidelines Support Library