GitHub Visualizer - Enter user/repo and see the project visually
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Codeology - Open-source algorithm that visualizes GitHub projects
Tcpdf - TCPDF: Open Source PHP Class for generating PDF documents
Octohunt - Search to find developers in your city on Github.
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.