Foundler - Online hackathon weekends. Attend every other week.
Uniqode - Uniqode: Revolutionizing QR Codes, Simplifying Solutions.
Confs.tech - Open source list of tech conferences: JS / Ruby / Data etc.
QR Code Generator For Developers - A quick API to generate QR codes in your apps
HackHub - Host tech events and hackathons with ease 👨💻🛠
The QR Code Generator - Free Online QR Code Generator to make your own QR Codes. Supports Dynamic Codes, Tracking, Analytics, Free text, vCards and more.