WorksHub - Helping Software Engineers find paid work, learn and get hired through Open Source contributions. WorksHub is made up of computer scientists, machine learning experts and the best in talent acquisition.
Huntathon - Browse and submit Product Hunt Global Hackathon projects
Hacker Noon - How hackers start their afternoons.
Confs.tech - Open source list of tech conferences: JS / Ruby / Data etc.
Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.
CoFoundersLab - Meet 250,000+ entrepreneurs online