Treadie - Create your own micro-social network for topics
Jodel - What is Jodel all about? Jodel is the community that shows you what's happening in your area in real-time.
CryptoInfluence.io - First crypto influencer community
Berkanan - Chat with people nearby. Even offline, on an ✈️.
CityBugs - Improving cities to make them a better place to live in.
Spectrum - Browser-based app to visualize the frequencies of an audio file.