Foxit Reader

Lets face it sometimes the company that was the first to develop something isn't always the best. Adobe Reader is slow, has security holes, has an update at least every week, and just doesn't offer you what Foxit can. Foxit Reader is a light weight PDF reader that's free. It has some amazing features like tabs, yes tabs just like your web browser has tabs so you can be on multiple websites at once Foxit Reader has multiple tabs so you can have multiple PDFs open at the same time in one Window. This light weight program can even be made portable on a USB stick so you can take it with you and use it on any Windows computer without installing anything. Now thats a program with some usable features!

http://www.foxitsoftware.com/pdf/reader/