Userbars

Userbar Animator
Offers online tool to animate transitions for userbars. Archives, discussion forums.
http://ubanimator.com/

Userbar Depot
Discussion forums with tutorials, requests, critiques, and previously made userbars.
http://ubdepot.proboards77.com/

The Userbar Designer
Online tool for creating userbars. Video demonstration, discussion forums.
http://ubdesigner.com/

Userbars . net
Categorized and rated userbars. Tutorials and news.
http://userbars.net

Userbars.be
Large collection of categorized and rated userbars. Discussion forum, contest, FAQ.
http://www.userbars.be/

Userbars.com
Categorized userbars. Also offers tutorials and an animator tool. Visitors can request userbars or upload their own.
http://www.userbars.com/

Userbars.name
Categorized userbars and discussion forums.
http://www.userbars.name/

Userbars.org
Thousands of categorized userbars. Also offers tutorial, userbar of the month, contests, FAQ, discussion forum, and chat.
http://www.userbars.org/

Wikipedia: Userbar
Encyclopedia article describing userbars and use conventions.
http://en.wikipedia.org/wiki/Userbar