Monotone is a distributed version control belongs to the revision control category licensed under GNU GPL. The revisions tracked by monotone are collected into changesets. The history also traced by this software. It furnishes full of disconnected operations with decentralized synchronization. It uses cryptographic version to trace the file revisions and client-side RSA signatures to verify the user activities.
Monotone can run on the platforms such as Linux, Solaris, Mac OS X, Windows and all Unix OSs. You can install the one which suits you by following instructions given on the site. For every OS it contains separate packages.