Here is a quick list of vegan products I like and use often on my blog.
Tofu: House Foods and Nasoya
Tempeh: Lightlife and Trader Joe's
Seitan: I make my own most of the time, but I like WestSoy too.
And I love all of Tofurky Turtle Island products. I really suggest trying them all. Tofurky for the holidays, deli slices on your sandwiches, and hot dogs and sausages for BBQ's.
Soy: Silk and surprisingly Costco's Kirkland brand.
Hemp: Living Harvest
Other: Nutritional Yeast
Dairy Product Alternatives:
Butter/Margarine: Earth Balance
Mayonaise: Follow Your Heart Vegenaise
Sour Cream: Tofutti Sour Supreme Non-Hydrogenated
Cream Cheese: Tofutti Better Than Cream Cheese Non-Hydrogenated
Whip Cream: chilled coconut milk
Ener G Egg Replacer
Apple Sauce, I usually use Santa Cruz
Soy: Soy Dream and So Delicious Soy Ice Cream
Non-Soy: Living Harvest Tempt (hemp-based), So Delicious Coconut Ice Cream and Rice dream (rice-based)