Trigger sequencer - 4 step 4 channel sequencer lots of switches.
Vtech Laptop Sequencer - Using the embedded BASIC, adding a memory cart, and using the printer port to make a programmable and random sequencer.
2 osc sequencer - 3 osc. 2 to gen control sigs and the 3rd for tempo.
PRNG sequencer - 2 LFSR pseudo random sequencer.
Basic Stamp BS2 microcontroller sequencer - Pseudo random or fuzzy sequencer.
Toys for sequencers - Toys and things specifically modded to work with the sequencers.