Would PicoGUI be suitable as an embedded GUI inside an OpenGL game?
With PicoGUI’s sdlgl driver and support for OpenGL inside themes, it has the potential to be a very powerful and flexable in-game UI. There is work in progress on integrating PicoGUI with a new game engine. Take a look at the “libpgtest” demo in the “apps” directory for an example of how this may work.