Stumble Upon

This is a great web browser plug-in that I have come across. It works with both Windows Explorer 7 (up to version 3.005) and Firefox 3 (up to version 3.17). The software simply "stumbles" around the internet based upon the categories that you have selected/are interested in. For instance, if graphic design is one of your categories, you can tell stumble upon to stumble only through sites that pertain to graphic design. That can be a really great research tool for someone and I have personally discovered many great resources for photoshop tutorials, stock images and other design related items. You can also stumble through some great videos and photos using it as well. The plug-in keeps track of sites that you like or dislike and in turn, shows you more sites that you give a thumbs up to and keeps a list of them like bookmarks. You can send links to friends and also (once they join) see what sites they've been checking out so you can visit them as well as many other great features.

From the site:
"Welcome to StumbleUpon

Join 4,734,696 Stumblers & Discover New Sites

Channel surf the internet with the StumbleUpon toolbar to find great websites, videos, photos and more based on your interests. StumbleUpon learns what you like and makes better recommendations.

Connect, Meet and Share

Connect with friends and share your discoveries, meet people that have similar interests."

Check it out at www.stumbleupon.com.