I have tried a few recipies from
http://www.fatfreevegan.com and they are pretty good. You'll get good tips in making changes to your baking for low fat options.
Just my personal experience; when eating vegan it is not as important that you "count calories" to lose weight, but rather make sure you're eating a balanced diet. This way of eating naturally has less calories because your not eating processed foods or the dairy products that have a bunch of calories in them.
Enjoy the journey!