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