saving seeds

All the veggies I grow are heirloom, when I harvested tomatoes earlier this week I saved some seeds.
Black plum tomato, Jasper violet tomato and Martina tomato. I am not to impressed with the Martina, I was excepting a sandwich tomato, but I honestly don't remember reading the description in the catalog, so don't judge them on my account. I will still save the seed to trade with someone.