1: Grizzly with JazzFunkKit:
Grizzly ended up at 8th place and is a powerful drummachine featuring eight drumpads with built in filters and effects. Grizzly is completely free of charge.
Free Jazz Funk Drum Sample Library
It's a relatively small kit--a kick, snare, two toms, and two cymbals--just like something a jazz drummer would play at a gig or low-key recording session.
2: Plogue sforzando with Meatbass:
Plogue sforzando is a free, highly SFZ 2.0 compliant sample player. Advanced sample hobbyists now have a powerful tool to experiment and share instruments without relying on proprietary formats.
Meatbass is a free open source sample library of a double bass.
3: Upright Piano:
Designed as a light-weight sketching piano, the VS Upright No. 1 is a clean sampling of an upright piano, the standard of homes, small clubs and studios around the world. With a broad dynamic range and a bright, clear tone, the upright can still display a soft side when needed.
4: MrTramp2 Electric Piano:
MrTramp2 is a physical modeling simulation of the soulful Wurlitzer(TM) 200A Electric Piano. It is available for Mac OSX in both VST and AU formats.