Happened to come across this interesting application today and thought of sharing it with our readers. The software takes in your lyrics and puts it to tune picking from its database of tunes from the occurrence of the words in existing songs.
Though the tunes may seem disjoint at the beginning, with some trial and error you should be able to make a decent mashup. So go ahead.. Exercise your creative vein.. Make your own musical collage and share it with your friends!

Source: http://www.sr.se/