Celestia - Real-time 3D visualization of space
Tape It - App for songwriting & audio recording.
Heavens Above - Website for tracking Satellites, Space ships and other space objects.
Songcraft.io - A platform for songwriters to write, organize & collaborate.
See A Satellite Tonight - Free web app to explore satellite locations.
Horucco - Horucco is an cloud based app for musicians, songwriters, producers of every skill levelExplore chords and discover related chords on the fly.