hyperbolic geometry
- poincaré hyperbolic disk http://mathworld.wolfram.com/PoincareHyperbolicDisk.html
- and InfoViz
- tamara munzner's h3 work
- and crocheting
- and knots
- some folding
software
- SnapPea “for creating and studying hyperbolic 3-manifolds” > http://www.geometrygames.org/SnapPea/