Typora - A minimal Markdown reading & writing app.
Swarm - Swarm lets you earn prizes and compete with friends based on the places you go.
Dillinger - joemccann has 95 repositories available. Follow their code on GitHub.
Good Place - Virtual memorial park
StackEdit - Full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.
Be Forever Me - Record videos, search your memories, create your life story