It's not too late to get some late Cabbage in, and a crop of Pole Beans still have time to produce if you get them in this week. Suckers pinched from your Tomato plants and planted will grow and produce. Onion Seeds can be planted soon for next year.
All is not lost just yet, as long as you don't get an early frost in your area. There is still almost 100 growing days before cold weather arrives in the northern parts, longer if you are more southern. Plus alot of places have those tomato and other vegetable plants still available for sale at well below normal prices.