Offline QR Code Generator - A browser add-on that allows you to quickly generate a QR code offline with the URL of the open tab...
hCaptcha - Do you use a captcha to keep out bots? hCaptcha is a drop-in replacement for reCAPTCHA that earns website owners money and helps companies get their data labeled.
Kaywa QR Code - Kaywa QR Code is a QR-Code Generator.
MTcaptcha - Enterprise Captcha solutions
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.
GeeTest CAPTCHA - GeeTest protects your websites, mobile Apps and APIs from bot threats.