92 Gears is a lovely, hypnotic animated GIF. Ball Bearings in a Hypersphere is a mathematical discussion of its generalizations.
Making Of The Bear and The Hare - For the John Lewis Christmas advert Hornet/Blinkink directors Elliot Dear and Yves Geleyn took the two most traditional and time-honored animation processes – stop-motion and traditional hand-drawn 2D animation – and combined them to create something innovative and unique.
Pony Creator - create ponies (in the My Little Pony:Friendship is Magic style). [Flash]
Beaded Polyhedra ❂ More beadwork (mathematical and otherwise) by Gwen Fisher ❂ Still more beadwork galleries at beAdinfinitum ❂ Three-dimensional finite point groups and the symmetry of beaded beads [pdf - some algebra, but lots of illustrations]
Plus magazine has compiled all their articles on mathematics and the arts into one handy-dandy page full of highly enjoyable articles ranging from limericks and screeching violins to the restoration of frescoes.
Visual Aesthetics in Early Computing (1950-80) - a little look back at plotters and light pens and flow charts, which I found a bit nostalgic. You can watch Lapis, Permutations and Arabesque on YouTube.
Some lesser-known superheroes and their stories.
Skelewags - drawings from a delightful Burtonish/Goreyesque world, including some skewed takes on Carroll's Alice.
Art Deliverance - Alex Klochkov's gallery of abandonment from the Soviet Union. There's next to no explanation of the photos, unfortunately. Indirectly via Retrospectacle's post about the brain lab.
FillCell is a sort of graffiti wall of mini-posters drawn with very simple tools (to impressive effect, in some cases). Flash - drag the background to see more of the wall.
basik.ru (seen previously) is a vast photo- and art-blog - so vast it can be a little overwhelming, so here are some places to dive in: 3D baked goods, food sculptures, sprouting keyboards and books, bookish figures, more wire warriors, surreal prints and photoshoppery, miniature architecture, wall-painting architecture, facial archetypes from the Soviet Union, a grotesque alphabet book and other freakish critters, old bicycle cards, a porcelain zodiac set, a bridge to nowhere, итд, итд, итд...
Biro-art - fantastic ballpoint drawings.
Sphere and circle arrangements, the Droste effect, and more: mathematical imagery by Jos Leys. The Droste effect article is informative, too.
Caligraft - computational calligraphy.
Rock art tour in the Sahara.
Painted beehive panels (accompanying article here) from the Museum of Apiculture [virtual tour, flash] in Radovljica, Slovenia.
Balance of Contradictions and Flawless Imperfection (caution: slow-loading images in the latter), two galleries of Ukrainian surrealist Sergey Poyarkov, whose name I stumbled across via this amusingly Ukraine-centric map.
Watercolor landscapes of Poland, Slovakia, Ukraine, and Hungary by Thomas Ender (1793-1875). The main frame for each painting allows you to open a large view, or read about the region depicted.