Paul's URL Changer
Tiny helper app that allows you to specify up to ten URLs and a display period. Use right-click 'options' to configure these. Then just hit the icon in the Chrome bar to start scrolling through the URLs - each will be displayed in turn for the specified period.
Note that this is not necessarily a release quality app and was written for a specific in-house project. Feel free to have a play though, if you find it useful!