Open source
git-annex
Manages large files with Git without storing their contents in Git
Beyond GitManage big files with Git
Alternatives to Perforce P4
12 tools like Perforce P4, chosen by what they do. About Perforce P4
Free
Mercurial
Free distributed version control that handles projects of any size
Beyond GitDistributed version control
Open source
Fossil
Distributed version control with built-in wiki and issue tracker
Beyond GitVCS with wiki and tickets
Curated
Diversion
Cloud version control for large repos, games and creative projects
Beyond GitCloud VCS for large repos
Open source
Git LFS
Git extension that stores large files on a server, not in Git history
Beyond GitLarge file storage for Git
Open source
Apache Subversion
Open source centralized version control system for teams
Beyond GitClassic central VCS
Open source
Sapling
Scalable source control from Meta with stacked work and Git support
Beyond GitScalable source control, Meta
Open source
Jujutsu
Git-compatible version control system with a simpler workflow
Beyond GitGit-compatible modern VCS
Open source
Git
Free, open source version control for tracking code changes
Git ClientsThe standard version control
Open source
Gogs
Lightweight self-hosted Git service that runs as a single binary
Git HostingPainless self-hosted Git
Open source
Review Board
Open source code and document review tool with approval workflows
Code ReviewMature open source code review