MacDown - MacDown is an open source Markdown editor for OS X, released under the MIT License.

Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.

Frost - An open API for Blockchain timestamping

Tyke - Mac menu bar app that @torrez really needed to take notes

Typora - A minimal Markdown reading & writing app.

Thought Train - Stop using sticky notes to remember what you're doing 📒 🚫