Wake is a build tool that aims to replace make/bazel/etc. It requires that source files are checked into git before it will recognize them. https://github.com/sifive/wake
Something not mentioned here is http://ditaa.sourceforge.net/ This project is in java (ew) but it's open source and could probably use a rewrite in something more modern.
Apple's software is full of race conditions. I have the newest phone and the newest update and I see them in the settings app, notifications pull down etc. unbelievable