Community Server is a white label social networking platform. It runs on Microsoft .NET / IIS technology. It powers the MySpace Forums and Microsoft's adCenter. Starts from $3k per year (small site), $50 per seat (min 200 seats) or $20k per server.
How to install Internet Explorer 6 and 7 side by side. *Very* useful for development and testing.
Install Internet Explorer 5, 5.5 and 6 in one easy script