Foundler - Online hackathon weekends. Attend every other week.
QR.io - Generate fully customized QR Codes, with color shape & logo
Confs.tech - Open source list of tech conferences: JS / Ruby / Data etc.
VisualCode - QR codes for everything
HackHub - Host tech events and hackathons with ease 👨💻🛠
QR Code Payments - Cashless transactions for your business