Foundler - Online hackathon weekends. Attend every other week.
Startup Stash - A curated directory of 400 resources & tools for startups
Confs.tech - Open source list of tech conferences: JS / Ruby / Data etc.
Content Marketing Stack - A curated directory of content marketing resources
HackHub - Host tech events and hackathons with ease 👨💻🛠
StartupResources.io - Tightly curated lists of the best startup tools