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

Mercurial is written in Python with platform independence in
mind. As a result, Mercurial is available on Microsoft Windows, GNU/Linux, Mac OS X,
Solaris 11 Express and others. You can
either download a binary package for the system of your choice or build it from
sources.