Sumatra PDF is a slim, free, open-source PDF viewer for Windows.
Sumatra has a minimalistic design. Simplicity has a higher priority than a lot of features. it's small and starts up very fast.
it's designed for portable use: it's just one file with no external dependencies so you can easily run it from external USB drive.
* Sumatra perform the following functions:
* open PDF files via menu
* open PDF files via drag & drop
* page up and p for going to previous page
* page down and n for going to next page
* q to quit
* set different zoom levels via menu
* Source code is also available for download.
* Whats New in version 0.8.1:
* automatic reloading of changed PDFs (contributed by William Blum)
* text integration (contributed by William Blum)
* updated icon for case-sensitivity selection in find (contributed by Sonke Tesch)
* language change is now a separate dialog instead of a menu
* remember more settings (like default view)
* automatic checks for new versions
* add command-line option -lang $lang
* add command-line option -print-dialog (contributed by Peter Astrand)
* ESC or single mouse click hides selection
* fix showing boxes in table of contents tree
* translation updates

The license of this software is Freeware, you can free download and free use this pdf software.