- chruby 1,820 Changes the current Ruby
- ruby-install 1,025 Installs Ruby, JRuby, Rubinius, MagLev or MRuby
- spidr 407 A versatile Ruby web spidering library that can spider a site, multiple domains, certain links or infinitely. Spidr is designed to be fast and easy to use.
- chgems 93 chroot for RubyGems
- gem_home 71 A tool for changing your $GEM_HOME