Oryol
A small, portable and extensible C++ 3D coding framework
...The framework includes core, graphics, input, resource, HTTP file-system, and local file-system modules. Assets can be loaded asynchronously from either local storage or the web. External Git-based modules extend Oryol with features such as animation, audio, Dear ImGui, and Nuklear integration. The project is no longer actively maintained, with its author now focusing mainly on Sokol and Chips.