I've got numerous bikes, bike frames, wheels, etc.that I'd like to donate I have many old bikes, parts, specific tools, etc. Where can I give them to?
The best option would be to find a local bicycle co-op and offer them the parts. (They would probably welcome bikes, rims, and tools.) 
You may not be near a co-op; if that's the case, there are numerous "pay it forward" threads on bicycle forums, but you'd end up paying postage; useful for small or esoteric parts. (I've given away a lot of stuff that way.) 
You could also try Freecycle, but since that's more of a general audience, I doubt many people on those lists would even know what, say, a bottom bracket is, let alone how to use it. For giving away a complete working bike, this might be an excellent option. (Hey, their logo includes a guitar and a bike!)