SoundNode - SoundCloud desktop app (OS X, Windows, Linux)
Community Canvas - A framework to build meaningful communities
Cumulus - A SoundCloud player that lives in your menubar.
Geneva - An all-in-one communication app for groups & communities
Sleeve - Your currently playing track displayed right on your desktop
Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.