Smart has tried its darnedest to diversify. It introduced the Smart Roadster in 2003 and the Forfour in 2004. It even did the Crossblade speedster in 2002. But each of those has fallen by the wayside, leaving the Fortwo as its only product. But that's all about to change.
In the U.S., we've come to know the Smart brand just for its ForTwo, but other markets have seen a wider variety of models from the Daimler brand including the Smart ForFour that was produced from 2004 through 2006. This bigger vehicle from Smart added two extra doors and a rear seat for some passenger space. While we've already seen spy photos for the next ForTwo, judging by these spy shots of a stretched-wheelbase test mule, Smart is hard at work developing a next-generation ForFour as well.