Stealthy: Secret Messenger - Chat anonymously with friends & strangers
Bashupload - Upload files from command line to share between servers
Roomvine - Chatrooms for real life venues, neighborhoods and events
FilePizza - Open source application used to transfer file via WebRTC and WebTorrent.
Jodel - What is Jodel all about? Jodel is the community that shows you what's happening in your area in real-time.
BlackHole File Transfer - Blockchain-based file transfer. Designed for everyday use.