CasterSoundboard - A soundboard for hot-keying and playing back sounds. (For podcasting)
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
JN Soundboard - An open-source hotkey soundboard program
keezy - A colorful soundboard. Play with music.
Soundplant - Play sound files with the computer keyboard
Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.