PitchWall - Browse new startups, and submit your mobile app/games startup's beta page here.
Foundler - Online hackathon weekends. Attend every other week.
Product Hunt - A website that lets users share and discover new products
Confs.tech - Open source list of tech conferences: JS / Ruby / Data etc.
SimilarPages.com - SimilarPages has found and classified millions of interesting sites hidden due to low popularity with the goal of helping you discover and search a larger portion of the web
HackHub - Host tech events and hackathons with ease 👨💻🛠