Treehouse - Treehouse is an award-winning online platform that teaches people how to code.
Journalistic - A simple, yet powerful micro journaling app
Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.
Nomie - Open-source mood and life tracking
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
Cactus - Static site generator for designers. Uses Python and Django templates.