ClearCase

ClearCase is an "enterprise" level source control system. It sucks for small teams. Sharing your work with team members is a simple 7 stage process:

1. Check-in your changes to your developer stream
2. Rebase your developer stream
3. Deliver your changes to the integration stream
4. Check-in your integration stream
5. Create a base-line
6. Recommend the base-line
7. Your team members can the rebase there developer streams from your recommended baseline!

ClearCase is very slow at adding files, a project I added had about 10 files, and took over a minute to check-in! The Visual Studio 2005 integration is flaky:

• It fails with an empty dialog box when opening a project
• It fails "Can complete the process" when trying to save a checked-out file
• It fails to check-out a file, even though VS thinks the file is checked-out

We are trying to work with unreserved check-outs, but ClearCase requires developers to explicitly merge simultaneous changes, nice.