Foundler - Online hackathon weekends. Attend every other week.
CollabFinder - Find cofounders and makers to help build your project
HackHub - Host tech events and hackathons with ease 👨💻🛠
Founders Nation - Find or become a startup cofounder
Confs.tech - Open source list of tech conferences: JS / Ruby / Data etc.
Maker Network - Explore the Product Hunt Maker network