tlbox saves links and organizes them by category so it will be easier to find. You might bookmark with del.icio.us but as your bookmarks grow, it will become cumbersome to manage. For instance, you can instantly look up for CSS or Linux related bookmarks right away with tlbox.

tlbox integrates with Firefox (compatible up to Firefox 3). Once the add-on is installed, it appears as a dropdown menu much like your typical Bookmarks folder, except that it has a fixed set of iconized subfolders, ranging from .net to xml –basically categories that are relevant to computer geeks. There are even corresponding icons for the categories.

Via: Wisdom.