Perforce
We sleep better at night knowing our code and assets are pushed, filed, stamped, indexed, briefed, debriefed, and numbered by Perforce. Sure there are other version-control software products, and some of them are free, but Perforce is fast, rigorous and dependable. Plus there is a perverse charm in the way it uses the same command to do branching and merging. We use it for game development, system administration, documentation, and the website (well, we used to…)