The Sliding Panel plugin adds a panel that opens and closes to the top of your WordPress-powered blog. If you’re in need of an area to house more content yet not get in the way, this is the ideal plugin.
The plugin is built off the wonderful jQuery library and is fully widgetized, so you can add any content you want. If you want a login form. Add it. If you want welcome text. No problem. Category list? You’re covered.