I know Marigolds are good for planting near tomatoes. What are other examples of "Companion Planting"?

The pioneers usually planted corn, pole beans, and pumpkins together. The beans fertilized the corn by adding nitrogen to the soil. The corn lifted the beans off the ground so they'd get more sunlight and wouldn't rot. And the pumpkins, with their prickly vines, annoyed raccoons so much by sticking into their soft feet that they left the corn pretty much alone.

lots-here is another-nicotina hearby potatoes-is a flowering plant that potatoe bugs love-the nicotine content in them cause the bugs to be unable to breed-really cuts back on them as being a problem-shouldnt plant it close to tomatoes though as they can cross pollinate------smile and enjoy the day