Patchwork
Patchwork is a GUI frontend to the distributed revision control system darcs.
Status
At the moment, Patchwork is very much pre-alpha but this shall change.
Development
Patchwork development was started at the BTU Cottbus as a student project under the supervision of Wolfgang Jeltsch.
Patchwork uses the Functional Reactive Programming library Grapefruit.
The source code of Patchwork will soon reside in a darcs repository under http://code.haskell.org/patchwork/main.