Official project website is oatc.io
Idea is to keep Swift modules cross-platform compatible (Linux, OS X and iOS) while the client apps probably won't be. I've played with NanoVG, tested cross platform GUIs, but currently it isn't a priority. Along with the core modules, I'll give my best to write nice macOS/iOS client apps and see if I can attract other developers (which probably will be hard since ATC is a very specialised area). Anyway, it's fun for me to prototype different ideas, play with modular design, I'll see how it will work out.