Perforce

Same inside VMware, another big user of Perforce. We've got an increasing number of developers using git-p4 wrappers, and even now tools using it - the git based pre-submission build testing stuff evens twitters at @vmwarepbs if you submit something that breaks the build :)

Although everyone always talks about getting rid of it, there is so much build, QA and release infrastructure built around it, I can't fathom it could ever happen. But, using git wrappers, us developers can pretty much forget that it's even there :)