git was created because a proprietary VCS was being a dick

The ones I've seen in the wild are pvcs and ccc/harvest, but there are others. I think they usually try to brand it as part of a larger end-to-end SDLC tool or change management, or it's built to work with a specific proprietary system like Autodesk vault.

There were many.

I was going to say git butler, which wraps git, but actually looks like that's gone open source

There's perforce