Curious - 15,000 lessons in tech, biz, DIY and more. Grow your skills.
CoFoundersLab - Meet 250,000+ entrepreneurs online
Frontend Center - Screencasts on the web platform for web professionals.
Confs.tech - Open source list of tech conferences: JS / Ruby / Data etc.
Udacity - Join Udacity to learn the latest in Deep Learning, Machine Learning, Web Development & more, with Nanodegree programs & free online courses.
Founders Nation - Find or become a startup cofounder