Botcraft is a cross-platform C++ library to create bots
Utility to convert between various subscription format
User mode C/C++ extended API library for Win32 programmers.
Yocto/GL: Tiny C++ Libraries for Data-Driven Physically-based Graphics
An extensive list subsystem, written in C
GDAL wheels for python and C/C++ projects (Linux only)
486 lines of C++: old-school FPS in a weekend
WebSocket (WS) and WebSocket Secure (WSS) server and client library
C++ framework for robot kinematics, dynamics, motion planning, control
A very simple, fast, multithreaded, platform independent HTTP and HTTP
Clint is a library for Qt projects to create charts, trees, etc.