Adobe Acrobat Reader
Free program and web browser plugin that allows users to read PDF files
FreeFileViewer
A streamlined file viewer and music player that makes it simple to access your files
File Viewer Lite
Open documents even if you don't have access to the program that created them
PDF Reader Pro
A PDF editor and reader that allows you to open, merge and split PDF files
File Viewer Plus 3
An advanced file viewer that allows you to open, convert, save and transform files