[seesaw]

+1 for clearcase. I enjoyed the time I used clearcase, and never found another one that was as pleasant to use as an end user.

[Borg3]

Ugh. Ive been both using ClearCase and also were Admin of it. While as user it was pretty fine to use, as Admin I saw how complicated and fragile the whole thing was. They distributed model is absolutly terrible. You need powerfull box as a VOB server and probably be equal or even more powerfull box if you want to use dynamic views. We ended up using snapshot views.

I would choose GIT every single time over ClearCase.