Send Me Color! - With Send Me Color! you can send a hint to your contacts that will look like color card.
Briar - Secure messaging, anywhere
Partey.io - Invite to parties and events. Dead simple, privacy-first. Just send a link to your friends. No accounts needed!
Bridgefy - Integrating Bridgefy allows mobile devices to communicate in a secure and efficient way across...
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
The Serval Mesh - It works by using your phone's Wi-Fi to not communicate with other phones on the same network.