AlternativeTo - AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.
Foundler - Online hackathon weekends. Attend every other week.
Top Similar Sites - Top Similar Sites helps you find similar, alternative or related sites to any website instantly.
Confs.tech - Open source list of tech conferences: JS / Ruby / Data etc.
Growing Page - Browse web projects and evaluate them by multiple criteria.
HackHub - Host tech events and hackathons with ease 👨💻🛠