Tofu is definitely one meat alternative. Although I've usually eaten tofu with meat but I would sometimes prefer it meatless. Some vegetable dishes will taste better without meat.
The other is having gluten instead of meat. I don't want to call it "fake meat" anymore due to all the food scandals as of recent. Instead, it can be called as vegeterian meat or just gluten. It's a chewy treat though tofu is more nutritious so I want to mix them both.