[aoeuid]

And if you don't like Adobe, for Windows there's Foxit Reader, and for Linux there's Evince.

I can't vouch for Foxit, but viewing PDFs through Evince is also far more efficient in terms of processor usage, especially since flash seems to like to take up all the cycles it can get.

[rms]

Foxit is great, it feels much more like a Linux PDF reader than Adobe's reader. The editor is also good, it lets you edit PDFs at a relatively low level.