BitKeeper is described as 'is the original distributed source management system and the main inspiration for Git. BitKeeper is a fast, enterprise-ready, distributed SCM that scales up to very large projects and down to tiny ones' and is an app in the Development category. There are seven alternatives to BitKeeper for a variety of platforms, including Linux, Mac, Windows, BSD and Haiku. The best alternative is Git, which is both free and Open Source. Other great apps like BitKeeper are Mercurial SCM (Free, Open Source), darcs (Free, Open Source), Pijul (Free, Open Source) and Sturdy (Freemium).
Mercurial is a free, distributed source control management tool. It efficiently handles projects of any size and offers an easy and intuitive command line interface. Mercurial efficiently handles projects of any size and kind.
Darcs is an advanced revision control system, for source code or other files. It is fully distributed, and supports lazy fetching of the remote repository (fetching only what is needed at the time, rather than all history).