$4.99Pricey Mind Mapping App Best feature is real time collaboration. This could be a great tool for English classes. LFA's very own, Tom Wenman uses this app to help generate ideas keep them organized. "Popplet is a platform for your ideas. Popplet's super simple interface allows you to move at the speed of your thoughts. With Popplet you can capture your ideas, sort them visually, and collaborate with others in realtime."