ScanTailor!

The smallest, fastest, most feature-rich PDF editor/viewer available

K2pdfopt (Kindle 2 PDF Optimizer) is a stand-alone program which optimizes the format of PDF (or DJVU) files for viewing on small (e.g. 6-inch) mobile reader and smartphone screens such as the Kindle's.

gscan2pdf can scan, clean the scan and do OCR on the scan or imported images (incl. existing PDFs, DjVus or other file types), and make PDF and DjVu-files with embedded OCR-text. It works together with tesseract, ocropus, cuneiform an gocr-OCR-engines

Briss aims to offer a simple cross-platform application for cropping PDF files. A simple user interface lets you define exactly the crop-region by fitting a rectangle on the visually overlaid pages.

Free (and open source) editor for manipulating PDF documents. GUI version + commandline interface. Scripting is used to a great extent in editor and almost anything can be scripted, it is possible to create own scripts or plugins.

PDF Cutter is a free PDF document splitting software, it can help you to quickly split PDF files. Software supports three splitting methods, you can choose according to your requirements, simple and easy to use.

You only digitize your documents — fileee will take care of the rest. Type and content of the document will be recognized automatically. You will never have to exhaustically search for documents, never forget about bills or loose contact information.

Deskew is a tool for batch deskewing (auto-straightening) scanned text documents. Deskewing is a term used for fixing the scans to get the lines of text straight. That means rotating the image of the scanned page to compensate for the misalignment of the paper in the scanner.

Infix PDF editor lets you open, edit and save PDF files. It’s easy and quick – you can change text, fonts, images and more. And, unlike other PDF editors, it works like normal word processing software, so it’s really easy to use.

JotNot Scanner is an iPhone application that uses the phone's camera to scan documents and pictures into electronic PDF files that can be saved on the phone. The application also processes the images to make them clearer.

Through the use of a Docs.Zone web tool, you can enjoy the benefits of converting numerous types of documents into other file formats within minutes. It is not only quick and easy to use, but it provides high quality prints through a converter that provides them with ease.

When you need a digital copy of some paper document to send out, but there is no flatbed scanner nearby, it can help you!