Spectro - Spectro is a freeware audio file analyzer for windows.
Hum - Songwriting for iPhone
Lossless Audio Checker - A utility to check whether an audio file is truly lossless or not.
Tape It - App for songwriting & audio recording.
Friture - Friture is a program designed to analyze audio input in real-time.
Songcraft.io - A platform for songwriters to write, organize & collaborate.