libmui: classic Mac OS and GS/OS widget library for Linux

This is a contender for the World Record for Feature Creep Side Project. It is pretty high in the contender list as it's a bolt on to another contender for the World Record for Feature Creep Side Project (the MII Apple //e emulator).

It is a library that duplicate a lot of a Macintosh Classic Toolbox" APIs. It is not a complete implementation, but it is enough to make a few simple applications, also, all the bits I needed for the MII emulator.

libmui GitHub page

This is absolutely wild.