- Wallpaper Groups
- David Joyce, Clark University.
- Wallpaper Patterns: Japanese Design
- A math museum in Japan.
- Discontinuous Groups of Rotation/Translation in the Plane
- Xah Lee.
- Symmetry in the Plane
- David Reid, Memorial University.
- Where's the Math? Plane Symmetry
- Suzanne Alejandre and Susan Addington, Math Forum.
- Gallery of Interactive Geometry
- Geometry Center.
- Symmetry and the Shape of Space
- Chaim Strauss, Geometry Center.
- Artlandia
- Mathematica-based graphic design software.