UserGuiding - Create in-app experiences with the most straightforward product adoption platform — quick implementation, lasting user engagement.
Kaywa QR Code - Kaywa QR Code is a QR-Code Generator.
Usetiful - Fight user churn with great user onboarding. Interactive product tours and smart tips significantly improve your user retention.
ZXing Project QR Code Generator - Generate QR Codes.
Userlane - Digital adoption platform with interactive guidance for software applications allowing anyone to understand and master any software from the get-go.
GNU-Barcode - GNU Barcode is a tool to convert text strings to printed bars.