Are there alternatives to Visual Studio Team System and Team Foundation Server?

Visual Studio Team System and Team Foundation Server offers a lot of goodies like source control, unit testing and automatic building.

I'm wondering the following: What alternatives are there for .NET developers that has all of this?

The following questions might also be useful in your research:

• What do you use as a good alternative to Team System?
• Is there anything like a small version of TFS?

Hope that helps.

Martin.