Quoted: Free extras built by the community to extend your Last.fm experience.

Quoted;
Jiglu plugs into your site to automatically create intelligent tags and links for your web content. This means that people can dive straight in and read what they want - your most popular blog entries or even stuff buried deep within your site.

Quoted: Jumptags.com is a revolutionary Web 2.0 social bookmarking web service for collecting, storing, sharing and distributing web bookmarks, notes, rss feeds, contacts, and much more. Based on AJAX and other next generation web development techniques, Jumptags.com offers the easiest, fastest, most intuitive and productive way of maintaining and collaborating bookmarks and other internet resources online.

Quoted: Keotag - tag search multiple engines, tag generator and social bookmark links generator

Internationalization Tag Set (ITS) Version 1.0

With the blueorganizer Firefox extension, your browser becomes smarter. It helps you personalize your web experience based on what you already like. It harnesses your information to help you discover relevant new information and save time.

Quoted: See what the world is clipping. Join conversations. Follow your favorite clippers. Clip, tag and share interesting stuff you find on the web.