Craving tomatoes

My tomatoes are big and green, but the seem to be taking for ever to ripen. Exacerbating things is the fact that most are volunteers and I don't know if they will be turning green, yellow, orange, red or pink when they ripen. Top shot is the only ones ripe so far, 1 red and 2 pink cherries. Below is one shot from each of the other plants that are yet to show their true colors.