Available PDF viewing software:
Installation involves going to http://get.adobe.com/reader/completion/?installer=Reader_9.5.4_English_UK_for_Linux_(.deb) (for UK English) or http://get.adobe.com/reader/completion/?installer=Reader_9.5.4_English_for_Linux_(.deb) (US English) and running
sudo dpkg -i adobe-reader954.deb where
adobe-reader954.deb is the debian file you downloaded from the website.
This is the one I use the most, I find it's got all the features I would like in a PDF viewer (including that you can search the document for specific key phrases or words, that you can zoom in and out, enable continuous and discrete one-page or two-page viewing of the document) the only problem with it is that it is prone to freezing up given the opportunity.
Installation is simply
sudo apt-get install evince. Approximately 80% satisfaction rating (approximately, there were 170 reviews and I couldn't be bothered averaging their star ratings and dividing them by 5). Can also be used to view: PS, EPS, DJVU, DVI, XML and XPS files.
sudo apt-get install epdfview to install. In the software centre it received a 56.2% satisfaction rating (i.e. the average star rating divided by 5).
To install run
sudo apt-get install mupdf. In the software centre it received a 70% satisfaction rating.
sudo apt-get install okular to install. This software received a satisfaction rating, in the software centre, of 90.7%.