gtklick is a simple metronome with a GTK interface
and native JACK support. It offers four different sounds, arbitrary meters and beat patterns, and a speed trainer. It's possible to save profiles and restore them later.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This release adds the ability to load custom audio samples and to adjust the sound's pitch. The speed trainer has been changed so that the regular tempo setting is now the upper limit.