- urchin 34 A Unix shell for Ruby programmers.
- jobby 13 Jobby is a small utility and library for managing and running jobs in concurrent processes.
- ruby-gd 9 Ruby 1.9 compatible fork of ruby-gd, the C binding to the GD graphics library.
- rubylibcrack 7 A binding to the *nix password strength checking library, libcrack/cracklib.
- syscalls 4 A Ruby FFI library which implements missing POSIX system calls.