Mindmeister
So I've tried Mindmeister and made a to do list... Well I may not be the most busy person but I forget easily. Go and check Mindmeister out, and see if you can do your to do list! unfortunately, Mindmeister does not allow us to export our mind mappings and etc., so I've taken a screenshot. It requires premium or something like that, this is the reason why it won't export the files as pdf/jpeg.