Commandline Challenge - Test your command line skills
productboard - Beautiful and powerful product management.
Prompt - Prompt provides fully-integrated writing education solutions, combining instruction, curriculum, and feedback. We support educational institutions, companies, and individuals.
ProdPad - ProdPad helps your team gather ideas, surface the best ones and turn them into product specs, and then put it all on a product roadmap.
Cwiki - A Command line interface for searching Wikipedia!
ProductPlan - Cloud-based product roadmap software solution