Sven Neumann
Sven Neumann is credited with keeping The GIMP software project going for many years. His weblog says: "Since I am a GIMP hacker, there will be quite a bit of GIMP talk here. But it’s my blog, so I reclaim the right to talk about whatever comes to my mind."
He is the author of The GIMP Pocket Reference. According to his profile on ohloh.net he has been active since 1998 or thereafter in a number of projects -- The GIMP, GNOME, Pango, GTK+, Glib, gtk-doc, and DirectFB.
According to OReillynet.com "Sven Neumann studies physics at the University of Düsseldorf in Germany. He has used The GIMP since 1997 and is one of its main developers." Michael J. Hammel, author of "The Artist's Guide to GIMP Effects", acknowledges in his introduction to his book, "The GIMP development team with special thanks to Sven Neumann for keeping the project going for many years....":