Free VSTi's from Necromare:
Pong
http://necromare.blogspot.com/2011/01/free-vst-pong.html
Toys
http://necromare.blogspot.com/2011/01/free-vst-toys.html
Kazoo
http://necromare.blogspot.com/2011/01/free-vst-kazoo.html
New Free Soundfonts:
http://www.archive.org/details/NoisecollectorSoundfontsBatch1
Don't forget the old Deadman's Beatbox soundfont:
http://www.archive.org/download/dullducodances/DeadmanBeatbox.sf2
And the Magical Musical Thing VSTi:
http://www.archive.org/details/magicalmusicalthing
Stay tuned....