Huntathon - Browse and submit Product Hunt Global Hackathon projects
The Product Management guide - A book on how to create and ship products that people love
Confs.tech - Open source list of tech conferences: JS / Ruby / Data etc.
Sunsama - Calendar and scheduling for teams
MVP-Challenge - 2 weeks. 1 MVP startup. $0 costs
Product Management Templates - 9 essential templates created by product leaders