theSkimm - theSkimm app anticipates what you need to know and when.
icmptx - ICMPTX is a program that allows a user with root privledges to create a
Iodine - iodine is a free (ISC licensed) tunnel application to forward IPv4 traffic through DNS servers (IP over DNS). Works on Linux, FreeBSD, NetBSD, OpenBSD and Mac OS X.
Navisens - Indoor & outdoor location without beacons, WiFi, or GPS
Tooyoo Emergency Sheet - Free & secure, emergency medical information sharing
Localizer - Free self-hosted open-source crowd-translating service