BitKeeper , by BitMover and originally authored by Larry McVoy, is a proprietary distributed source code management system.
- Bitkeeper includes an implementation of SCCS called BitSCCS.
- Was (is?) a component of Bitkeeper, written in Tk, for visualizing file change sets.
- Is a component of Bitkeeper, at least initially written in Tk, for visualizing checkins.
Bitkeeper is based on BitSCCS and supports multiple users. It Includes a file merge, revision control check and revision control graph browsing tools, written in Tcl/Tk. It supports most of the RCS style commands.