开源项目 配置管理软件推荐

We're a small start-up so it might not be what you're looking for, but here goes:

Source Control: Source Safe
 Bugtracker: Gemini (by Counter Soft)
 Test Case Management: Test Link
 Project Management: Basecamp
 Build System/Continuous Integration: Cruise Control
 Team communication: Google Talk (easy since the entire company is on Google Apps)