Somebody hears about git??, first I explain what is Git,
An official definition from http://git.or.cz/ says:
Git is an open source version control system designed to handle very large projects with speed and efficiency, but just as well suited for small personal repositories; it is especially popular in the open source community, serving as a development platform for projects like the Linux Kernel, Ruby on Rails, WINE or X.org.
Yesterday I downloaded a version from windows in order to try Sproutcore Demos, a link is above, but remember git is multiplataform. I tried on Sun Solaris and the performance is excellent.
http://www.cygwin.com/setup.exe
a guide with the basic commands is on
http://www.kernel.org/pub/software/scm/git/docs/user-manual.html
