LilyPond looks like an interesting musical notation program. It relies on ASCII text input, and translates it into high-quality graphical notation, harking back to the professional engravings of yore. This reminds me of the LaTeX markup and typesetting language—you get to focus on your product and stop futzing around so much with the visuals. I’ll have to give it a try. The developers have written an interesting essay about the nuance and perfection that most computer-generated notation lacks, and thus, the inspiration for LilyPond. Typography in music! Sweet!