Scan documents to PDF and other file types, as simply as possible.
Split and merge PDF files on any platform
converts PostScript or PDF files to other vector graphics formats
Online service for PDF conversion (to PDF)
High Volume Variable Data Printing & Mail Merge in PDF format
Application to inspect text and images of pdf books.
A PDF parsing, modification and creation library.
Here are my python scripts written until now
PHP class for PDF
Mini SDK JavaScript API library PDF web apps
PDF Library for Developers
Insert PDF into DWG in AutoCad. Autolisp Frontend for PSTOEDIT