Freekaraoke
Free download of over 1000 complete karaoke songs in midi format.
http://www.freekaraoke.com
Diversi Tune
Collection of midi song files performed by real humans, including jazz, christmas, gospel, jewish, and classical songs.
http://www.divtune.com/
Karaoke.nl
Karaoke.nl
http://www.karaoke.nl
Lyrics Pro
Lyrics Pro
http://www.newce.com/lyricspro/
REC Music Foundation
REC Music Foundation
http://www.recmusic.org/siteindex.html
Yaks
Yaks - yet another karaoke system
http://www.come.to/yaks