I had a small role in helping Jamie port XScreenSaver to Android. It was fun working with someone whose writings I have been reading for thirty years or so, an

I had a small role in helping Jamie port XScreenSaver to Android. It was fun working with someone whose writings I have been reading for thirty years or so, and I learned a lot from him (like the difference between HAVE and USE in C, or how to architect and run a project). Patches are always welcome! Jamie (and/or other helpers) ported things like X11/Xlib to OpenGL, and then OpenGL to OpenGLES for iOS and Android. Jamie and so forth ported some of X11/Xlib's XFillPolygon to OpenGL - like for Convex shapes, and I did the Nonconvex shapes part, but we still didn't do Complex shapes yet. Lots of stuff like that outstanding (also it is still using GCC and make for the NDK, although Android has moved more towards LLVM/Clang and CMake). Lots of interesting stuff and the code is open/free. As I said, patches always welcome, especially on the Android (and iOS) front.