Originally Posted by future_computer
Why is it still 9.4?
It is 9.5.1 actually.
Adobe reader is required for filling out certain PDF forms. This cannot be done reliably in a ny other software.
Now the fact that this filling thing has its quirks and sometimes just doesnt work in Adobe Reader its another story (a web app would work so much better for this purpose, but well...).
For just viewing PDFs you can use evince (its really good all around), okular if you are into kde. There is a new pdf reader, qpdfview that is very fast and actually has some form functionality - it is in beta stage.
On Windows there is Foxit and Sumatra PDF.