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

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.

Subversion is the best version control system for software development and is used by developers worldwide.