The universal markup converter
Open source PDF editor
Prepress preparing tool and PDF editor
PHP library generating PDF files from UTF-8 encoded HTML
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
Application to inspect text and images of pdf books.
Online service for PDF conversion (to PDF)
A PDF parsing, modification and creation library.
Here are my python scripts written until now
Fast, Nimble PDF Writer for Ruby
Merge images and PDFs to a single PDF
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