Timebox Photo Journal - Instantly organizes all your photos into daily photo stories
Typora - A minimal Markdown reading & writing app.
Waddle Photos - Meaningful stories about your children.
Dillinger - joemccann has 95 repositories available. Follow their code on GitHub.
Tookapic - Capture your life with one photo a day (365 Project).
StackEdit - Full-featured, open-source Markdown editor based on PageDown, the Markdown library used by Stack Overflow and the other Stack Exchange sites.