PDF-XChange Editor - The smallest, fastest, most feature-rich PDF editor/viewer available
Pdf+ - Pdf+ is a reader for PDF documents, which are also known as Adobe Acrobat files.
ScanTailor - Scan Tailor is an interactive post-processing tool for scanned pages.
Easy PDF - EasyPDF is a free online PDF conversion suite that can help you convert & create PDFs. Securely, anonymously and without any limitations.
Briss - Cross-platform application for cropping PDF files in a simple and fast way via a GUI.
FoxyUtils Online PDF Tools - All the PDF tools you need! Save time with our easy to use online tools to merge, split, convert, and edit PDF files.