bzr-gtk is a plugin that is based on a collection of earlier plugins for 
Bazaar. It is currently maintained by Jelmer Vernooij <jelmer@samba.org> and 
Szilveszter Farkas <Szilveszter.Farkas@gmail.com>.

bzrk was written by Scott James Remnant <scott@ubuntu.com>. 
It's vaguely based on a screenshot of gitk (the equivalent tool for git)
shown to me by Fabio M. Di Nitto <fabbione@ubuntu.com>.

gannotate was written by Dan Loda <danloda@gmail.com> and later maintained 
by Aaron Bentley <abentley@panoramicfeedback.com>.

nautilus-bzr was written by Jelmer Vernooij and Jeff Bailey.

Olive was written by Szilveszter Farkas <Szilveszter.Farkas@gmail.com>.

Numerous other people have contributed useful patches.  See the Bazaar history 
of this branch for a full list of authors.