If you are an ethical vegan then you may be interested in some of the things you might be using that come from dead animals: Source 1d
Feel free to extend the list of things people use that come from dead animals such as leather and jello.
There is always items made from parts of animals. A little research on things will tell you where it comes from so you can be totally informed. The more you learn about stuff you use on a daily basis the more some of these total vegans will be able to use less and less of what they may need.