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.
- not a diagram tool but a mind map tool