xLua, xLua is a hot-fix solution plugin for Unity3D, it supports android, ios, windows, osx, etc.
Tokei (時計), Tokei is a program that displays statistics about your code. Tokei will show number of files, total lines within those files and code, comments, and blanks grouped by language. (Provides badges!)
https://github.com/Knetic/govaluate Arbitrary expression evaluation for golang
http://iknowwhatyoudownload.com/ torrent download history by IP
Monodraw, Powerful ASCII art editor designed for the Mac.
https://github.com/fuchsia-mirror google's new operating system
https://github.com/chrislusf/seaweedfs a simple and highly scalable distributed file system
CppCon 2015: Chandler Carruth "Tuning C++: Benchmarks, and CPUs, and Compilers! Oh My!" also applies to other languages @ComMouse
FreeOrion is a free, open source, turn-based space empire and galactic conquest (4X) computer game
https://github.com/exercism/exercism.io Quickly ramp up in new programming languages
http://zazuapp.org/ opensource replacement for Alfred