Hi Marcia,
Here's one I make that gets good reviews. I just use whatever happens to be coming out of the garden at the time, in whatever quantities are available. It's very fresh.
Just combine the following in a large bowl (all quantities are approximate because I don't measure anything

)
Tomatoes (coarsely chopped):
2 quarts cherry, grape, pear, or other small tomato (I like to used several kinds) or 3-5 large sized tomatoes. I don't bother peeling or seeding.
1-2 cucumbers: peeled, seeded, and diced
1-2 zucchini and/or yellow squash: diced
1-2 sweet peppers: diced
1-3 fresh chilis: diced - play with the quantity on this to get the desired amount of heat.
3-5 Tbsp chopped cilantro
3-5 Tbsp lime juice
2-3 Tbsp apple cider vinegar
1 Tbsp ground cumin
salt & pepper to taste
You can also add other things like fresh sweet corn kernel, black beans, chick peas...whatever strikes your mood. It's a very versatile recipe.
ETA: Since this is a fresh, raw salsa, you'll want to eat it within a few days...not that that's a problem at my house

.