Mozilla Firefox

Wow. I've been using Firefox for a couple of days and it's an evolutionary step ahead of Internet Explorer.

Granted pointed out the tabs function to me where you have multiple URLs open on one running instance of the browser. This is fabulous as it helps lower memory usage and helps prevent Windows XP from wedging. The 'find' function is very nice as well. It's active as you type and is very friendly.

Oh, and the pop-up blocker actually works. I have IE's popup blocker on and the Google tool bar popup blocker on my IE browser and I'm continuously pummeled by popups that get through.

I also could import my IE bookmarks during install. Thank God.

Overall this browser makes all the others I've experienced look like rubbish.