pdflayer - Free, powerful HTML to PDF API supporting both URL and raw HTML conversion. Unlimited document size, lightning-fast and compatible PHP, Python, Ruby, etc.
Scanly - Free contactless NFC/QR digital menus management
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
QR Menu Creator - Create a no touch QR code menu for your restaurant/bar free
Tcpdf - TCPDF: Open Source PHP Class for generating PDF documents
SliceQ - Automated phone ordering system for restaurants