With using Mind mapping tools, you can create and represent various types of schemes, thoughts and ideas and apply them on presentations, projects and meeting. There are some best mind mapping tools for nexus 7 on Google Play store.
* SimpleMind Free mind mapping by ModelMaker Tools
A simple but very useful way to collect structure thoughts and draw a mind map. The app supports Undo/Redo, move, regroup and change styles. I have used it on N7 without any crashing or bugs.
* iMindMap HD by ThinkBuzan
The app offers a limitless workspace to organising tasks, capturing ideas and makeing note-taking. It looks awesome but locks on a pricey cloud and lacks of some important features. I couldn't remove a branch and have to delete whole map.