In my search for good audio tools, I found UJAM, a free tool for recording your voice, creating a song, converting your voice to an instrument...you name it. You can see a beta walk through on YouTube, but basically, you sign up, record into your computer's microphone, and make a few manipulations--presto, a song. You can edit chords, the song melody, add instruments, etc. Or you can turn your voice into an instrument! This might be a good tool for musicians, music teachers, and certainly for budding rock stars! Maybe it would be good for unique exercise in a poetry class...the spoken word as song.
This is the mother lode of guitar tab sites. Uke and bass tabs are available as well. The site has really upped its game in the last few years - the accuracy and quality of the transcriptions is greatly improved. The ProTab subscription is well worth it.