Pharmacy is a GNOME-compliant front end for CVS (Concurrent Versions System).
The software is still in an alpha stage, but it provides at least some kind of
GNOME-based front end for CVS.
Bazaar-GTK is a GTK+ frontend for the Bazaar
version control system. It provides Nautilus
integration and a stand-alone application for
browsing Bazaar branches.
A Java library for doing conversion between JSON and Java.
A Websocket implementation in Qt.