How many types of electric cars are there?

There are several types of electric cars but unfortunately only a couple are being rushed to mainstream markets in the near future. The Tesla Roadster has been around for a couple of years and they are also working towards a sedan, the Model S. Fisker Automotive, who actually helped Tesla design their EV, has developed the Fisker Karma. The Nissan Leaf is another example of a full-on electric vehicle. Also Chevrolet's prized Volt can operate as completely electric but it is also powered by gasoline motors to extend the range. Then there are significantly smaller scale projects like the Mitsubishi iMev.