My personal favourit is the Blendtec 'Total Blender'.
I can do almost anything with it, it just tears through it and blends it evenly. It's an all-in-one appliance that makes smoothies, fresh juice, ice cream, milkshakes, cappuccinos, margaritas, soups, sauces, bread dough, dressings, salsas and more! It probably replaces up to 9 other appliances with one fast easy-to-use machine, at a fraction of the cost.