Heirloom Tomatoes

Heirlooms, by definition, must be open-pollinated.  While there are no genetically modified tomatoes available for commercial or home use, it is generally agreed that no genetically modified organisms can be considered heirloom cultivars.  Basically what it all boils down to is they are fresh, un-tainted tomatoes.  They are also generally multi-colored and beautiful.
http://en.wikipedia.org/wiki/Heirloom_tomato

Courtesy of Wikimedia Commons.  Thanks!