BookmarkManager is a online bookmark manager, it is meant as a replacement for a browser's bookmark system. It runs on a servlet container, and needs no database. It uses the Prevayler system for storing it's data. It is a easy way to keep your bookmarks in one place so you can access them from anywhere on any computer. You add a javascript bookmark in the browser to send the current page you are on to the bookmark server where it stores it
Scuttle: Online Bookmarks Manager
Oyax is a social bookmark manager. It allows you to easily add web sites you like to your personal collection of links, categorize those sites with keywords, and share your collection not only with your own browsers and machine, but also with other people.
ScuttlEDU is different in that it is designed to make tagging easier for educators. When you register for the service, you are asked to provide your grade level and subject area. When you add a bookmark, these two pieces of information become tags. You have the option of not using these tags as well