- http://www.squeaksource.com
- http://source.squeakfoundation.org
- http://squeak.saltypickle.com
- http://source.impara.de
- http://mc.lukas-renggli.ch
- http://squeaksource.blueplane.jp
It's fun to browse the last one - it's japanese (from the SqSquare project) but I'm able to navigate and explore it. I like the FileMan package from it. It makes file handling in Squeak much easier.
If you want to set up an own squeak source server: some months ago I prepared an image for easily setting up SqueakSource.