Monotone (software)
Monotone is an open source software tool for distributed revision control. Monotone tracks revisions to files, groups sets of revisions into changesets, and tracks history across renames.
The focus of the project is on integrity over performance. Monotone is designed for distributed operation, and makes heavy use of cryptographic primitives to track file revisions (via the SHA-1 secure hash) and to authenticate user actions (via RSA cryptographic signatures).
Read more about Monotone (software): Design, Other Features, Milestones, Implementation, Monotone As Git Inspiration, Support, Monotone Users