We always grow a lot of tomatoes. We love to share them and also sell organic tomatoes. I freeze tomatoes all summer long. I do not can them anymore as I do not have a cool dark place to store the canned goods. We do not have air conditioning in our farm house so freezing works well for us.
My favorite tomatoes are Early Girls, any Cherry, Sweet 100 and Tommy Toes. I have a Tomato Juicer I use when I want to make juice and sauce. It is great for Cherry tomatoes too. I pour the tomato sauce into plastic bottles to freeze. Plastic bottles of all sizes work well for storing in the freezers. Some tomatoes I freeze chunky, some as sauce.
I also love to cook up stewed tomatoes in the crock pot with Bell Peppers and Banana Peppers and freeze these too in plastic bottles. I do not add onions. You can sauté your onions fresh and add to stewed tomatoes when you are ready to use them.