We're not going to lie to you: learning to play a musical instrument is hard. Really hard. Even with onesoftware'>teaching software is an affordable way to find out if an instrument is truly for you (minus the cost of the instrument, of course).
Instrument Instruction at Hand
Musical instruction software is really only available for the most commonly played instruments. However, this shouldn't stop you from checking them out. As any musician can attest, learning how to play one instrument and, more importantly, learning how to read music makes understanding the concepts behind most every other instrument that much easier.
*MIDI keyboards and even allows you to import your own MIDI files.
*chord dictionary, all the tools you'll need to play like a pro.
