Heirloom tomatoes come in shapes other than perfectly round and colors other than red, hence the purple and the yellow pear.
The $1 pattern for the red & purple is up on Ravelry:
The yellow pear version pattern will be up soon.
DH first grew yellow pear tomatoes for us many years ago. I had never seen such a thing. After that, not one made it to the table, they were all garden snacking food.
Garilynn on Ravelry Garilynn on Etsy Garilynn on Patternfish