PDF-XChange Editor - The smallest, fastest, most feature-rich PDF editor/viewer available
Altarsoft PDF Reader - Altarsoft PDF Reader is a simple to use PDF files management program that allows its users to view PDF files, encrypt the files and even annotate these files as well.
ScanTailor - Scan Tailor is an interactive post-processing tool for scanned pages.
eXPert PDF Reader - eXPert PDF Reader is a free to use PDF reader and views for the Windows operating systems.
Briss - Cross-platform application for cropping PDF files in a simple and fast way via a GUI.
Xodo - Try easy-to-use PDF tools that keep your documents safe. Work with your important files across all platforms and devices with the ultimate all-in-one document solution. Your productivity lives at Xodo!