Here are some products that I have tried and enjoyed:
Baked Goods
Brownie mix - Betty Crocker
Muffins - Udi's
Cinnamon rolls - Udi's
Beans
Red kidney beans - Market Pantry
Black turtle beans - Bob's Red Mill
Breads
White bread - Udi's
Raisin bread - Udi's
Corn bread mix - Pamela's Products
Pancake mix - Pamela's Products
Hamburger buns - Udi's
Bread crumbs - Energ
Brown rice tortillas - Food For Life
Cereal
Chex cereals
Granola - Udi's
Oatmeal - Glutenfreeda
Chips/Crackers
Sweet potato chips - Terra
Cheddar cheese nut & rice crackers - Blue Diamond Natural
Tortilla chips/cracker The Works - Food Should Taste Good
Flours - Bob's Red Mill
Grains
Jasmine rice - Trader Joe's
Brown Jasmine rice - Trader Joe's
Quinoa - Earthy Delights
Other
Xanthan Gum - Now Healthy Foods
Pasta
Brown rice pastas - Trader Joes' Organic Brown Rice Pasta
Pizza Crusts
Pre-made crust - Udi's