JUCE is an open-source cross-platform C++ application framework
Cross platform toolkit for creative coding in C++
Google Testing and Mocking Framework
Static reflection for enums (to string, from string, iteration)
A fast and reliable entity component system (ECS) and much more
Industrial-grade RPC framework used throughout Baidu
Remove Inequality by Production of Knowledge.
LÖVE is an awesome 2D game framework for Lua
Object oriented frameworks - PowerBuilder, PowerServer & InfoMaker!
Developer Assistant for PUC-Rio Tecgraf sci/tech toolkits on GNU/Linux
C++ Frontend for the RenderMan Interface
Source code is here - https://sourceforge.net/projects/lcmd-git/
A minimalist Flutter framework for rapidly building Flutter apps
Python bindings for the Chromium Embedded Framework (CEF)
A simple C++11 network server framework
Build Cross-platform Applications
Middleware for distributed applications
Caffe, a fast open framework for deep learning