I've used the CSO1 as a signal generator as well..... which always leads to some noodling/writing.... which then leads to "Oh shit, what am supposed to be doing?"
Old Rockman Stereo Chorus half-rack. Gives a nice spread of "where is that coming from?" sorta effect. Helpful on background vocals to keep them away from the center. The modulation effect of the chorus is nice too.
Vox Tonelab. I still haven't heard a better sounding guitar amp emulation. Roughly one third of the models work really well, most of them are plain shit. But the ones that work really well happen to be the sounds I need the most.