Models!

Models is a flexible diagramming tool. It doesn't force you to follow strict, often useless rules for creating your models. Instead, it focuses on providing simplicity and beauty to the software design activity. Models! features code generation, class and association edting, postit notes, grids and alignment tools, coloring, formatting and powerful search capabilities and its user interface is 100% intuitive!
Features:
- UML 2.0 Support
- Usecase diagrams
- Class and object diagrams
- Activity diagrams
- Component, deployment, package and composite structure diagrams
- Postit notes, grids, alignment tools, coloring, formatting and search capabilities
- Integrated libraries of software architectures and patterns
- Class and Association Editing
- Code generation for Java, ObjectiveC and PHP
- Multitouch zoom
- Export option to .PDF and .TIFF
- Customizable toolbar
- Useful enhancements: 1click to copy&paste; resize proportionally...