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
Apologies if this is already here... I did a quick scan through and couldn't find it.
This is a surprisingly good sounding free ( donationware - but optional ) drum VSTi: https://www.powerdrumkit.com/
There's only one kit of drum sounds, but the sounds that are there are VERY useable, and there's some other sounds not shown in the UI (e.g. cymbals / levels of hi-hat openness) - just work your way up the keyboard to find them.
It's got a built in mixer with control over volume/pan/com
