The following sextic was found by W. Barth. It has 65 ordinary double points, the maximal possible number.

Hyperbolic PDEs on the surface of a sphere
by James A. Rossmanith

Surface with constant Gaussian curvature

A 5-dimensional analogue of Rubik's cube

The Weaire-Phelan foam is a counterexample to Kelvin's conjecture
about the best partition of space into equal-volume cells.
By John M. Sullivan.

Two overlapping grids of reflective tubes produce the above Moiré pattern by Koert Feenstra.

A polyhedron made of a 7/4-Cuploid, 7 triangles, 7 squares, 1 7/3-heptagram

Inverse Julia Set calculation for √(z - c)/ √(z - d) on the (x,z) plane, extruded along the y-axis.

This surface by Xah Lee, which he calls the Borg Cube, is given by the equation
sin(xy) + sin(yz) + sin(zx) = 0

Spherical version of the 2.5 dimensional Julia Set

The basic inverse quaternion julia set.

Ikeda Attractor by Paul Bourke

This image was created by Jonathan McCabe from a cellular automata program he wrote.

"Each pixel represents the state of the 4 cells of 4 cellular automata, which are cross coupled and have their individual state transition tables. There is a "history" or "memory" of the previous states which is used as an offset into the state transition tables, resulting in update rules which depend on what has happened at that pixel in previous generations. Different regions end up in a particular state or cycle of states, and act very much like immiscible liquids with surface tension."

Circles generated by Mobius transform by Ed Pegg Jr.

3D totalistic cellular automata

John Conway's Game of Life is a cellular automaton in which randomized cells evolve according to a fixed set of rules. Usually this evolution appears as an animation, here we see the evolution through time in a still image, with height from top to bottom corresponding to subsequent generations of cells.

Quaternion Julia Fractals

"Girih tiles have interior angles that are multiples of π/5. In the examples shown here I’ve applied the girih concept to polygons with angles that are multiples of π/7."

By Joe Bartholomew

A 3-d model of tuna, anchovy and bluefish populations given certain parameters.

The Catalan numbers are a sequence of numbers, much like the Fibonacci numbers, which are given by the equation

Like the Fibonacci numbers, they too pop up all over the place, for example, the Catalan numbers correspond to the number of ways a regular n-gon can be divided into n-2 triangles.
Above is a visualization of the Catalan numbers.

By John C. Hart in 1989
Read more about quaternion fractals (and see more images) here and here.

A map of the internet by Barrett Lyon

Snowflake

Snowflake hitting the ground

Photos by Andrew Osokin using a macro lens.

A rather interesting link by artist Matt W. Moore

Vector graphics by artist Matt W. Moore.

Numerically Controlled from Paper Fortress on Vimeo.

Electric Sheep

Three-dimensional rendering of Julia set using distance estimation by Gert Buschmann.

100th post!

A Wolfram Demonstration titled Combinations of Sines in the Complex Plane by Stephen Wolfram. He writes "Combinations of two sine functions must always have their zeros on the real line. Combinations of three need not. The height here is the absolute value of the sum of sine functions; the hue is the phase."

These images are from a Wolfram Demonstration by Michael Schreiber titled Complex Exponential Resonance. He writes "Complex exponentials of complex exponentials feature resonance patterns. There is only one polygon; black regions are under an odd number of self-overlays."

This sculpture is 8 feet in diameter and, from what I can tell, is a compound of five octahedra (a stellation of the icosahedron). The designs are projected onto its surface.

“Parmenides I” by artist Dev Harlan

A 3-d printed image made from readings on a seismometer by artist Luke Jerram

E8 rotated from F4 towards G2
by A. Garrett

by D Sheffield

This image has always been my favorite example of recursion.

Visualizing Prime Numbers

Inversive Circles by William Gilbert, University of Waterloo.

Nested Klein bottles by Alan Bennett.

Discs in geometric proportions cover the unit disc.
From The Geometry Junkyard.

I just finished watching "Between the Folds," a documentary on origami and paper folding by Vanessa Gould, and was blown away by some of the amazing works and artists in the film. One of my favorites was Chris Palmer, whose works are about movement and light.

This video is inspired by some of his other pieces:

An image from an awesome demo by Ed Pegg Jr. that's part of the Wolfram Demonstrations Project. This image corresponds to Gaussian integers raised to the 11th power. The demo allows one to view Gaussian integers raised to any fractional power. The user can choose a numerator and denominator less than 20.

Gaussian integers raised to the 17/6 th power

Voronoi Patterns by Craig S Kaplan

Algorithmic art created by a program called LORMALIZED by Reza Ali that uses the Lorenz equation.

This image by Gabriel Doyle is a representation of the universal cover of the doubly-pointed Heegaard diagram of genus 1 of a (1,1)-knot.

"Octopod" by Syntopia (Mikael Hvidtfeldt Christensen) is an example of algorithmic art.
"In algorithmic art the creative design is the result of an algorithmic process, usually using a random or pseudo-random process to produce variability."

A Lorenz attractor by Nathan Selikoff, titled "Butterfly Effect."

"Equal Areas" by Susan McBurney.
This image, inspired by Leonardo DaVinci, builds upon a concept of equal areas. The sum of the areas of the red shapes in the bordering semicircles is equal to the sum of the areas of the red shapes inside the center circle; and the same goes for the green, yellow, pink, and peach shapes.

"Knot Structured" by George W. Hart was made by assembling 30 identical pieces of laser-cut wood. Read more here.

Stability and chaos are analyzed by computing the Lyaponuv exponent which is plotted above.

A generalization of the Cornu spiral, this is an example of a polynomial spiral described by Dillen (1990) for which the curvature is a polynomial function of the arc length.

Klein's j-invariant in the complex plane