Tetris Blitz - Race against the clock in a two-minute blitz to clear lines and rack up points before time runs out.
DocRaptor - As the only API powered by the Prince HTML-to-PDF engine, DocRaptor provides the best support for complex PDFs with powerful support for headers, page breaks, page numbers, flexbox, watermarks, accessible PDFs, and much more
Blockinger - An open source Tetris clone for Android.
PDFCrowd - Pdfcrowd is a Web/HTML to PDF online service. Convert HTML to PDF online in the browser or in your PHP, Python, Ruby, .NET, Java apps via the REST API.
Hextris - An addictive puzzle game inspired by Tetris.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request