jSider is a Envato marketplace alike side widget navigation.
It loading data from xml files, so you can change its navigation value without actually touching the code. It is perfect for your secondary navigation.
jSider is a very easy to use jquery toolbar, you can also use it as a sidebar.

Notice: You should not use jSider as your primary navigation, as it is made purely using JavaScript.

Features:

• Xml data, easy to change content.
• Build-in console for checking CSS sprite icons.
• No database or anything like that.
• 162 ready icons for you to use.
• Two column/Single column lists to fit your needs.
• Search panel.

Video Preview:

http://www.screenr.com/owss

Document

http://www.the-di-lab.com/cc-demo/js/jsider/manual/index.html

Manual file is included in download file.