elasticsearch-gui - AngularJS Client for ElasticSearch as a plugin.
Snapchat - Real-time picture chatting
ElasticHQ - Tool for ElasticSearch management and monitoring.
Element.io - Secure messaging app with strong end-to-end encryption, advanced group chat privacy settings, secure video calls for teams, encrypted communication using Matrix open network. Riot.im is now Element.
Deja vu - A mind-blowing interactive piece to promote an album. Wow.
StealthChat - StealthChat is Encrypted, Private, Secure Calls and Chats on Android and Apple iOS