From a poster at a listserv I'm subscribed to - thanks shout out to Maven:
Alfalfa (not the best choice, but the best known), broccoli, mung bean, cabbage, radish, wheat, sunflower, and the ever-popular chai are all great as sprouts and very, very healthy. All you need is a mason jar, rubber band, seeds, coffee filter, and a sink. You get a crop every 3 or 4 days. In fact, they are considered enzyme and nutrient dense super-foods.