Synchrorep is a one click directory synchronization software. All modification will be reported to one to the other and vice versa. Usefull for nomads or speedup differencials backup.
Gaphor is a UML modeling environment written in Python. Gaphor is small and very extensible.
The repository is located at http://github.com/gaphor/gaphor.
RGnome is a gtk based frontend for GNU R, which is a widely used language for statistical computing. It features a fully working R console and an editor with syntax highlighting.