Sublime Text 2 plugin for running ruby tests! (Unit, RSpec, Cucumber)
https://github.com/maltize/sublime-text-2-ruby-tests
A full-featured package manager
http://wbond.net/sublime_packages/package_control
Easy and fast navigation between code definition
https://github.com/SublimeText/CTags
Detect the syntax of files that might not be detected properly (detects rails files which allows to use proper and powerful snippets)
https://github.com/phillipkoebbe/DetectSyntax
Plugin for some git integration into Sublime Txt 2
https://github.com/kemayo/sublime-text-2-git
TextMate Style ERB Block for Sublime Text (<%= %>, <% %>..)
https://github.com/eddorre/SublimeERB
Sublime Text 2 Ruby on Rails Related Files (allows you to easily navigate your Rails projects)
https://github.com/luqman/SublimeText2RailsRelatedFiles
Clipboard history plugin for Sublime Text 2
https://github.com/kemayo/sublime-text-2-clipboard-history
Cucumber syntax & snippets
https://github.com/drewda/cucumber-sublime2-bundle
Sublime Text 2 plugin to go to documentation (A command to jump to documentation for the current word)
https://github.com/kemayo/sublime-text-2-goto-documentation
Quick File Creator plugin for Sublime Text 2 (Plugin that lets you quickly create a file or a subdirectory using ST2's fuzzy matching feature)
https://github.com/noklesta/SublimeQuickFileCreator
Zen Coding support for Sublime Text 2 (http://code.google.com/p/zen-coding/)
Besides other plugins, I like those two:
Alignement: http://wbond.net/sublime_packages/alignment
SideBarEnhancement: https://github.com/titoBouzout/SideBarEnhancements