XMind is a brainstorming and mind mapping application. It provides a rich set of different visualization styles, and allows sharing of created mind maps via their website.
The application is available as an Open Source version and as a paid commercial 'Pro' version. XMind Pro offers extended features like Gantt charts, a presentation mode, export features (PDF, Office, MindManager and Freemind), audio notes, a merge feature, privately online sharing, and more.
The Open Source version is otherwise a very functional and powerful 'Mind Managing' software.
For a feature comparison see: http://www.xmind.net/pro/features/
Every package now contains 7 language packs, English English, German German, French French, Spanish Spanish, Japanese Japanese, Chinese(Simplified) Chinese(Simplified), and Chinese(Traditional) Chinese(Traditional). XMind will choose language automatically to fit your OS's settings.