<p>What good ruby gem sources would you recommend, besides <a href="http://gems.rubyforge.org/" rel="noreferrer">http://gems.rubyforge.org/</a> and <a href="http://gems.github.com/" rel="noreferrer">http://gems.github.com/</a>? It seems that RubyForge is missing most of the gems I look for these days...</p>

As far as I know, those two are it, with the primary being rubyforge, since that's the only source that a stock RubyGems install will search?  As popular as github is getting, gem developers still can't yet assume that github has been added as a gem source, and usually provide specific instructions like
```
```
gem sources -a http://gems.github.com
gem install person-gemname
```
```
or
```
```
gem install person-gemname --source http://gems.github.com
```
```
UPDATE
: gems.rubyforge.org, gems.github.com, and gemcutter.org have all been replaced by
```
rubygems.org
```