Where can I find a collection Of Ruby Gems?

Where can I find a collection of free available Ruby gems? Why reinvent the wheel if a gem is already available that you can re-use?

From stackoverflow

• RubyForge is the place to go.

• Wikipedia says:

  gem list -r -d
  

  http://en.wikipedia.org/wiki/RubyGems

• Here's a list of RubyGems at GitHub:

  http://gems.github.com/list.html
  

  Instructions on how to download are at the top of the page. It's no CPAN though...

• There are really only two important sources for gems available:

  1. RubyForge
  2. GitHub
  Sarah Mei : As much git and github are cool and awesome and everything, I miss having one canonical place to look for gems.