An analogue LFO in 2HP - capable of generating both square/pulse and saw/triangle waveforms in various speeds from 'slow' to 'maybe not as slow as all that'. Also works well as a system clock generator.

A VCO, albeit a microcontroller-based one, in 2HP? Yes indeed - does pretty well in the 'amount of noise generated per HP' stakes ... the firmware is hackable, too.

A dual manual gate module in 2HP - use it to reset sequencers, one-shot envelope generators and literally tens of other uses (maybe)

Go push yer buttons ...