Well, you probably did not know that the Pachelbel Canon in D had a fugue. Well, neither did Herr Pachelbel. This piece, Pachel's Belle Canon and Fugue, begins with the recognizable canon, now done for organ in two voices, with the pedal playing an unrealized figured bass. The fugue, added by Herr Wayland, opens with a subject that is a distortion a bit of the canon. A little tricky, but playable. The instrumentation is entirely GPO pipe organ.
The link is to the mp3 file on my Sibelius scores page.