If you're a karaoke fan, or it's a requirement for that nightclub you've always wanted to run, Kjams for Mac has reached the beta for version 1.0. The karaoke software has everything you need to get the party going, and what few reviews are out there say it's easy to use, extremely robust, and won't lock up your Mac. Development on kJams goes back to 2004, and reading the version history is a nice little stroll down memory lane to see software being developed in the days of OS X 10.3 Panther.
After nearly nine years in development, the beta is moving along at a pretty quick clip. Kjams is a robust karaoke player already, and it's good to see it push toward an actual 1.0 release.