I haven't found any no-sugar ketchup recipes, but I did find 2 that are relatively low in sugar. Don't know how it would taste to leave the sugar out, but you could substitute Splenda. As far as I know, it's the only sugar substitute that can take the heat of canning. The recipes are at the National Center for Home Food Preservation - http://nchfp.uga.edu/
. The 2 recipes are Tomato Ketchup (http://nchfp.uga.edu/how/can_03/tomato_ketchup.html
) & Country Western Ketchup (http://nchfp.uga.edu/how/can_03/cou...n_ketchup.html)
Then there are Pickled Green Beans aka Dilly Beans, Pickled Asparagus (a bit late for that), Artichoke Pickles - made with Jerusalem artichokes, Marinated Whole Mushrooms, Okra Dill Pickles, Pickled Onions, Marinated Peppers, Pickled Jalapeņo Peppers & Pepper Rings, Pickled Yellow Pepper Rings, Sauerkraut, Squash Pickles - II (#1 has sugar).
When I did a search for "no sugar added" I didn't come up with much - mostly it's jams & jellies. They do have a couple of Splenda recipes for pickled beets & sweet cucumber slices.
And, of course, there is always canned meat - it's definitely sugar free!