Typora - A minimal Markdown reading & writing app.
Headspace - Meditation made simple. Brilliant things happen in calm minds.
StackEdit - Full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.
Synctuition Meditation Program - Synctuition Meditation Program is a world’s most leading meditation app that comes with brand new 3D sounds that enhance the quality of sleep significantly.
MarkText.app - Mark Text is a Markdown editor for Mac, Windows and Linux.
Calm - Calm.com can help you reduce stress and increase calm.