Watch2Gether - Watch2Gether is an app that allows multiple people to watch the same content simultaneously and interact with each other while watching.
keezy - A colorful soundboard. Play with music.
TogetherTube - to watch videos with other people online
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
Syncplay - Syncplay is a different kind of entertainment platform.
Aftertouch - Aftertouch – 3D MIDI Controller created and published by Kevin Nelson.