MindMeister packs tons of mapping and sharing functionality into a sleek, simple interface easy enough for upper elementary kids through adults. Just when you think you've found all the cool things it can do, you discover another one. MindMeister lets you log in with Facebook, Twitter, and Google, and exporting to PDF, Word, and PowerPoint is easy. Other new functions that will benefit the classroom include comments and votes, calendar integration, videos, task management, mobile apps, and an emoji library.