Git is a free and open source distributed version control system designed to handle projects of any size with speed and efficiency.

Mercurial SCM is a free, distributed source control management tool that efficiently handles projects of any size with an easy and intuitive interface.

Darcs is a free and open-source, cross-platform version control system focused on changes rather than snapshots, offering a simpler UI.

Plastic SCM is a distributed version control system for large projects, now integrated into Unity DevOps for game and 3D development pipelines.