I'm a longtime GNOME contributor. I've been president president of GNOME Deutschland e.V. (you could say like GNOME Foundation in the US) from October 2004 - December 2006.

In the past I've been working and contributing on/to several GNOME related projects. Martin Grimme and I "invented" gDesklets back in 2003 which is quite successful. Currently, we're working on a new major version of it (see http://wiki.gdesklets.de/).