The universal markup converter
A Privacy First PDF Toolkit
Open source PDF editor
A simple tool for reading in poorly redacted documents
PDFCraft is a free, privacy-focused PDF toolkit
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
WorkerPDF is GUI for GhostScript created for PDF conversion
Application to inspect text and images of pdf books.
Online service for PDF conversion (to PDF)
Prepress preparing tool and PDF editor
a graphical user interface for the PDF Toolkit (PDFtk)
PHP library generating PDF files from UTF-8 encoded HTML
A PDF parsing, modification and creation library.
Here are my python scripts written until now
Fast, Nimble PDF Writer for Ruby
Convert HTML to PDF using Webkit (QtWebKit)
Merge images and PDFs to a single PDF
Manage your collection of PDF files
Convert files with output for dot-matrix printer into PDF