AMIP
Media player plugin that displays "now playing" information from media players to IRC clients. Also enables the uploading of song information to websites through FTP, SFTP, HTTP POST, and GET.
Power Karaoke
Provides software to burn, play, create, and convert karaoke songs.
Screaming Bee
Software for adding voice overs and audio for games, instant messaging, and voice morphing.
Wave Editor
Free and easy-to-use digital sound editing software for Windows. Supports all popular formats in mono and stereo.