MindMaps allows you to outline and visualize your ideas, plans, thoughts or any information you want in a simple graphical way.
You can apply individual styles to your mind maps, save, sync and backup it between your Windows Phone 8 devices (version for Windows 8 is planning)
http://www.windowsphone.com/ru-ru/store/app/mindmaps/99098e10-c91e-4030-906e-a5b015d6bc0a