Yamaha TG33 - Vector synth sound module from 1990. I think of it as a 'poor-man's Wavestation.' Each patch can consist of four sounds, each with their own independant LFO and envelope. There's no filter, but you get tone/feedback paramaters which suffice. The on-board joystick allows you to sweep between each element in real-time, or you can record joystick movements right into the patch. It has sampled waveforms and FM sounds (the latter can't be programmed from scratch without software). Quite fun and easy to program if you have half an hour to devote to a patch. Oh yes, and it has a fantastic bell sound reminiscent of the DX7 Tubular Bells.