GSnap - With GSnap you can get an auto-tune effect.

keezy - A colorful soundboard. Play with music.

Revoice Pro - Revoice Pro is an audio plugin used for vocal tuning, time correction and ADR.

Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.

Voxal - Modify your voice in any application that uses a microphone. From girl to alien, the voice options for online video games, avatars and podcasts are limitless.

Splice - Music creation, collaboration, and sharing made simple.