Typora - A minimal Markdown reading & writing app.
Loom - Loom is a screen recording extension for Chrome that gives people the ability to create and share media. Create your own videos using your camera, screen view, and audio. Read more about Loom.
Dillinger - joemccann has 95 repositories available. Follow their code on GitHub.
recordit.co - Make a short video capture of your desktop as a gif.
Markdown by DaringFireball - Text-to-HTML conversion tool/syntax for web writers, by John Gruber
Spiti - A private, internal YouTube for teams.