Berkanan - Chat with people nearby. Even offline, on an ✈️.
Charity Engine - Charity Engine takes enormous, expensive computing jobs and chops them into 1000s of small pieces...
Vuash - Send secret messages safely.
BOINC - BOINC is an open-source software platform for computing using volunteered resources
ShareAccount - Share your account without giving out your password
Apache Mesos - Apache Mesos abstracts resources away from machines, enabling fault-tolerant and elastic distributed systems to easily be built and run effectively.