If you're the type of person who uses a lot of search engines and doesn't mind having a toolbar installed, you might want to check out Firefox Super Search. This Firefox-only add-on puts the power of 160 search engines in one toolbar, with about 70 that can be searched right from the toolbar itself.

If you're used to Firefox's built-in search box, this is a pretty big step up both from selecting one engine at a time and having to add additional engine tools from Mozilla's catalog. It's also...