Basecamp Websites
pbworks.com
PBworks lets your team capture knowledge, share files, and manage projects. It tracks every change, and automatically notifies you and your team to keep everyone in the loop....
10,737 
$ 1,250,640.00
projectlocker.com
Free Subversion hosting, free Git hosting, free Trac hosting, and plugins to many tools such as Basecamp, PivotalTracker, and FogBugz, for as low as $19/month. Configuration...
1,169,343 $ 960.00