We've never been fans of Adobe's bloated and risky Reader for viewing PDFs. If you want to examine and edit PDFs, Australian-developed Nitro Reader remains our favourite. Version 3.5 of the free Reader product adds support for reading XML Forms Architecture (XFA) documents and incorporates various performance fixes, while the full-blown Nitro Pro package jumps to version 8.5 and adds the ability to convert files into PowerPoint format.
For basic PDF manipulation, the free version of Nitro Reader is fantastic, and includes handy features such as the ability to save a signature and automatically stamp it on documents. The conversion option in Pro is especially useful if you know a PDF document will end up being used for presentation purposes. Given the appearance this week of yet another Adobe Reader security flaw, it's definitely worth changing your approach to handling PDFs.