Due.work - Simplify your work, to-do's and communications
Lean Canvas - Business plans take too long to write, are seldom updated, and almost never read by others but documenting your hypotheses is key. Lean Canvas solves this problem using a 1-page business model.
360Katas - Open source Slack app for self development.
Business Model Kit - Explore revenue models to make money with your idea
Kaapi - Build happy, high-performing remote teams
Growth Hacker Course - An interactive online course from Ryan Holiday