This may be of interest to some. Plugin Boutique (and maybe some other vendors) are currently selling the Air Expand!2 VSTi for one dollar, one euro or one pound depending on your locality,
This is a 2500 preset VST that was originally developed as part of ProTools. Presets are well categorised and mostly good quality. It would make a decent sketchpad collection for those who aren't already maxed out with sound choices.