Cool PDF Reader is an interesting option because of several reasons. For example, because it weights no more than 200 Kb or because it is really easy to use.
No matter if you have never used a PDF viewer, because it is so easy that you will need not even one minute to get used to it.
In addition, you can convert the files into image formats (BMP, JPG, GIF, PNG, WMF, EMF y EPS) with just one click, or extract the text of the PDF fdocument to a .txt file.
And if you like it, you can take it with you, because it doesn’t need to be installed.