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.
RunaBook - RunaBook is a lightweight application that lets you create and organize notes, knowledge bases, and daily routines.
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
Idea Notebook - Idea Notebook is an app that allows you to keep track of your logs business ideas and track as well as organize them.
PDFShift - Convert any HTML documents to high-fidelity PDF using a single POST request
Scrapbox - A new style of note-taking that lets you create, discuss, and learn together in one self-organizing space.