iO-808 - Rhythm composer modeled after Roland's TR-808 drum machine.
ToT: ThisOrThat - Let your friends choose this or that for you
Beet - Create a video montage of your life’s most authentic moments
sup - The first creep-free way to see nearby friends
SOUNDS - Discover music with friends
Mu4e - Starting with version 0.9.8, mu provides an emacs-based e-mail client which uses mu as its back-end: mu4e.