Typora - A minimal Markdown reading & writing app.
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.
Dillinger - joemccann has 95 repositories available. Follow their code on GitHub.
Swarm - Swarm lets you earn prizes and compete with friends based on the places you go.
StackEdit - Full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.
Tooyoo Emergency Sheet - Free & secure, emergency medical information sharing