HakuNeko - HakuNeko is an all-in-one cross-platform utility that supports you to download manga and anime with various website support.
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
Hitomi Downloader - Desktop application to download images/videos/music/text from Hitomi.la and other sites, and more.
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.
HDoujin Downloader - A powerful doujin/manga downloader that supports hundreds of different websites.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request