del.icio.us
You can also create bundles of tags so all tags having something to do with a general subject will be displayed within the bundle. To make its use easy, there is a Firefox extension that places two icons on the Navigation Toolbar. One takes you to your page on the del.icio.us site and the other lets you tag the Internet site you are looking at if you want to add it to del.icio.us.
Finally, instead of just searching your tags to get to your bookmarks, you can do a universal search, which will produce both your tags and everyone else’s who has used that same tag in setting up their bookmarks. This serves as a search tool that can supplement Google.
One slightly awkward feature gives you the ability to search your bookmarks using multiple tags. If you want to do a multiple tag search, you need to click first on one tag, then look at the “related tag” section on the right of the screen. However, instead of clicking on the name that you want, you must click on the “+ sign” preceding the name. If you do that you will pare the selection of bookmarks down each time you click.