RadaeePDF SDK is a great PDF rendering and manipulation tool for developers. If you develop mobile or desktop applications the RadaeePDF SDK framework is the "Swiss Army knife" to handle PDF files. More than 6,000 applications are running the SDK on Android, iOS and Microsoft Windows UWP.
Big Faceless Organization (BFO)
Big Faceless Organization (BFO) develop Java APIs for working with PDF documents and graphs. Established in 1998, BFO has clients in over 50 different countries. Clients include, Amazon, Oracle, Siemens, VW, and Harvard University, as well as 50% of the top 30 banks in the World.
Document and text processing components implement the functionality to allow you to edit code and check syntax, or create word processing apps with spell checking facilities. Also includes components to present the output in a variety of file formats.