CLUT is a free, open-source extension for Chrome that allows you to cycle through the last used Chrome tabs. 

As it happens in Windows, and Mac OS X, using CLUT allows you to quickly move to the tab that was recently active or the tab you last used. In CLUT, you can cycle through a list of your most recently used tabs in the same way that you do with your Windows or Mac OS X application switcher.

Some users have complained that they can't switch to the tab in CLUT. This is not an official Google Chrome team project.