- cri 50 A tool for building commandline applications
- adsf 40 tiny static web server that you can launch instantly in any directory
- rcpu 21 VM emulator and assembler written in Crystal
- fast-aleck 18 Fast Aleck is a fast HTML-aware typographical enhancement library that lets your text use proper ellipses, smart quotes, proper dashes and more.
- cobject 7 A library that adds support for object-orientation with inheritance, polymorphism, virtual destructors and reference counting to C.