some of mine are slightly more niche-ish, i've got designs that allow you to use PIC or PICAXE to program your own patterns (or use BigClive's PIC firmware), others that retrofit specific products (PAR cans for example), and others that are just downright rude and silly.
I guess I could supply components for the smaller kits (1x PIC, 9x LEDs, 13x resistors etc) but that would become uneconomical/unmarketable very quickly with the boards that have 500+ LEDs...