Tape It - App for songwriting & audio recording.
Omegle - Omegle is one of the most popular online chat website allowing user to communicate with anyone without registration.
Songcraft.io - A platform for songwriters to write, organize & collaborate.
Chatrandom - Chatrandom provides medium to users for having chat at random with different users around the globe.
RiffShare - Write down a musical riff, send to band members, collaborate
LuckyCrush - Live random video chat