Scanly - Free contactless NFC/QR digital menus management
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.
SliceQ - Automated phone ordering system for restaurants
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Scan Menu - Get an online menu for your restaurant
Tcpdf - TCPDF: Open Source PHP Class for generating PDF documents