Manic is an 8 slot random VSTi sample player where you decide the samples, but Manic decides when to play them.
Samples are triggered according to their probability, on a tempo sync pattern. Also allows for randomising of volume, pitch, pan, delay, reverse and swing. You decide how much, but not when.
You can loop the sequence, change sequence seed with midi keys and quantise the pitch randomising for a more melodic sequence. Works well for random glitchy percussion, instant melodic sequences of multisamples or total chaos.