I thought the VideoNot.es app looked really interesting. There were several times when I was taking an economics class that I thought it would be super useful. I think it would be especially useful in math classes. Since you can take notes as the problem progresses, it would be helpful to be able to click back to the part that you get confused. I am not taking any online classes at the moment, but I can see how it would be very helpful. I also thought the Coggle app looked very interesting. However, I would not want to pay to use it. I used to be a Biology major (for all of one semester. It was awful), and I could see how helpful that app would be in laying out the genus and species. Overall, I would definitely try VideoNot.es first! :)