Freeware Instruments Thread
Since the freeware FX thread is doing well, how about we have one for instruments?
Razor already mentioned the huge collection available free for registering with Native Instruments, and I followed up with the free Kontakt drum instrument DrumMic'a.
If you're into combo organs, the first two I recommend are Combo V and Combo F, excellent modeled Vox and Farfisa organs. The developer went on to work for Arturia and expanded both of them into commercial products.
Dead Duck Software
I have just found a very under rated VST for using Sound Fonts and SFZ files. Its called "BassMidi VSTi"
http://falcosoft.hu/softwares.html#bassmidi_vsti
I have only just started looking into it, but it appears to be a better alternative to SFZ/SFZ+
Its Multitimbral. up to 16 parts
It can load up to 5 different Soundfonts/SFZ's
I loaded a 4GB soundfont, and it didn't skip a beat, or even pause while loading it!
it has some extra options regarding reverb (room