Sketch and Transformational INfrastructure is a toolkit for creating informal sketch-based user interfaces. See the SATIN toolkit homepage for an overview, documentation, as well as downloads.

This software is distributed under the Berkeley Software License.

Here are the static class diagrams:
1. Object Notation
2. Overview of Scenegraph

3. Graphical Objects 4. Views
5. Rendering 6. Interpreters
7. Strokes 8. Commands
9. Constants and Globals 10. Bridge Classes