Differential Geometry Page  
   Contains several figures which are the result of easy codes using Mathematica, including Enneper's surface.
   http://math.bu.edu/people/carlosm/Diffeo.html

Riemannian Geometry  
   Mostly a definition with a few equations.
   http://www.treasure-troves.com/math/RiemannianGeometry.html

ArXiv Front: DG Differential Geometry  
   Differential geometry section of the mathematics e-print arXiv.
   http://front.math.ucdavis.edu/math.DG

John Oprea's Home Page  
   This site includes references to the author's papers and books, including Differential Geometry and its Applications and The Mathematics of Soap Films: Explorations with Maple. There are also Maple files available for downloading.
   http://www.csuohio.edu/math/oprea

The Scientific Graphics Project  
   This site contains didactic and research information about the differential geometry of minimal and constant-mean-curvature surfaces. It also addresses their application in materials science. It is full of illustrations and animations, and also contains
   http://www.msri.org/publications/sgp/SGP/

Alfred Gray Differental Geometry  
   Graphics of suface geometry. Mathematica code and gallery of images.
   http://math.cl.uh.edu/~gray/

Finite Canonical Commutation Relations  
   A working paper on FCCR nxn matrices as local kinematical replacement for CCR, and representations by pxp matrices over Galois fields.
   http://graham.main.nc.us/~bhammel/FCCR/fccr.html

Differential Geometry  
   Lecture notes for a course at the Weizmann Institute of Science by Sergei Yakovenko. Chapters in DVI.
   http://www.wisdom.weizmann.ac.il/~yakov/Geometry/

Classical Curve Theory and Frenet Equations  
   A systematic overview of classical curve theory, including Frenet equations and their known solutions, some results on moving frames (relationship between Frenet and Bishop Frame), spherical curves and surface curves.
   http://www.geocities.com/expotition2002/curves/

Non-Commutative Geometry  
   A short historical review is made of some recent literature in the field of noncommutative geometry
   http://arxiv.org/abs/gr-qc/9906059