PM.PhasorSeq~
I'm posting this in my toolbox, too, but figured I'd put it up here for now.
It's very simple: it plays a rhythmically subdivided sequence of phasors (for example once at full speed, twice at half-speed, once at three-quarters speed)
It'd be great for all sorts of glitchy effects.
Whoops, screwed up the negative frequency. Here's an improved version that supports reverse phasors, phase inversion, manual reset, and adds a oneshot mode.