MAME is a multi-purpose emulation framework
A lightweight game server framework implemented with Actor Model
A fast and reliable entity component system (ECS) and much more
Open source framework simplifying the creation of C++ applications
Cross-platform UI framework that delivers native performance
Drogon: A C++14/17/20 based HTTP web application framework
LÖVE is an awesome 2D game framework for Lua
It's all about in-process message dispatching!
Support for legacy OpenGL in core profiles
Open-source, cross-platform, game-development tools
A cross-platform game library based on XNA, but written in C++
Build Cross-platform Applications
universal multi-platform light-weigth extensible scripting framework
Toolkit for the easy prototyping of hybrid games for Tabletop Devices
ONUSystem is A module-based framework for games and CG arts.
C++ Framework for slot machine games
BxEngine For Marmalade And QT