Canned tomatoes seem to be one of the worst. I do see a few companies
are talking about "no salt added" these days on some products. The
other option used to be tomato paste because the added salt is
minimal.
Things like chili powder are ridiculous. If I have time I try to make
my own. (dried chilies ground up in the blender with onion and garlic
"powder", not salt). That does end up being a lot more expensive than
the stuff in the bottle tho. On the plus side, you can use less.