Adobe Reader is free and freely distributable software that lets you view and print Portable Document Format (PDF) files. Adobe Reader also lets you fill in and submit PDF forms online.

Download Adobe Reader for Windows 2000/XP 7.0

Download Adobe Reader for Mac OS X 7.0

Download Adobe Reader for Windows 9x/Me 6.0.3

Download Adobe Reader for Linux 5.0.10

A 3rd party speedup tool for Adobe Reader is also available. It disables many of the plugins that are not needed. It has an easy to use interface including a couple of speed options as well as restore to default.
Download here