Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Paaatterns - Free collection of beautiful patterns for all vector formats
Anvil PDF Filling API - The easiest way to programmatically populate any PDF
Talent Pool by Minty - Reach award-winning illustrators for your projects
KDAN Mobile PDF Reader - PDF Reader is the one app you can rely on when you need a portable solution to work with PDFs.