Ableton Live
For anyone who ever wanted to make a remix, DJ a party, or play with beats. A great manual, good tutorials and a super slick interface make Live so easy to learn. Free demo (hint: use AudioHijack for saving).
iEatBrainz
iEatBrainz automatically adds the right song, artist, and album info to your iTunes music. No more messy iTunes Library.
http://bestmacsoftware.org/
