Stealthy: Secret Messenger - Chat anonymously with friends & strangers
Bulma - Bulma is an open source CSS framework based on Flexbox and built with Sass. It's 100% responsive, fully modular, and available for free.
Roomvine - Chatrooms for real life venues, neighborhoods and events
Milligram - A minimalist CSS framework
Jodel - What is Jodel all about? Jodel is the community that shows you what's happening in your area in real-time.
Material UI - A CSS Framework and a Set of React Components that Implement Google's Material Design