Rithm - Chat with music
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.
My Daily Planner - Organize your day with pen & paper. Free printable template.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Calendar Generator - 12 weeks on one physical page
Tcpdf - TCPDF: Open Source PHP Class for generating PDF documents