CasterSoundboard - A soundboard for hot-keying and playing back sounds. (For podcasting)
Dubsmash - From silly lip-syncing to full featured video messaging 😜
JN Soundboard - An open-source hotkey soundboard program
LIPP - Dub your voice over famous videos
Soundplant - Play sound files with the computer keyboard
Voice Swap - Live voice changer & face filters for video selfies.