Tessellations

Pentagons that Tile the Plane - Known solutions and a new recipe.
http://burtleburtle.net/bob/tile/pentagon.html

Penrose Tiles - Links in the Geometry Junkyard.
http://www.ics.uci.edu/~eppstein/junkyard/penrose.html

Samantha's Wallpaper Page - Wallpaper patterns and symmetry groups.
http://www.geocities.com/hbafscl/

Hans Kuiper - Hans Kuiper's work. Tessellations and optical art. Also tessellation software with the 17 wallpaper groups.
http://web.inter.nl.net/hcc/Hans.Kuiper/

Landry Art - Art of Kenneth Landry. Tessellations, polyhedra and polyhedra decorated with tessellations.
http://www.landryart.com/

Grotesque Geometry - Andrew Crompton's tiling and tessellation images.
http://www.cromp.com/tess/home.html

Tessellations with Java - Examples and source code.
http://dimacs.rutgers.edu/~rkrane/tessell.html

References about Tessellations - Compiled by Doris Schattschneider, Moravian College.
http://www.geom.uiuc.edu/software/tilings/TilingBibliography.html

Hop's Escher Tessellation Tiles - Escher-like tessellations.
http://www.tabletoptelephone.com/~hopspage/HopsTiles.html

Tilings and Geometric Ornament - Applying principles of computer graphics to the creation of geometric ornament, as a continuation of the tradition of ornamental design using modern tools and algorithms.
http://www.cgl.uwaterloo.ca/~csk/washington/tile/

Escher Web Sketch - Java applet drawing repeated patterns with selected symmetry.
http://escher.epfl.ch/escher/

Frieze Patterns - Definitions and images.
http://plato.acadiau.ca/courses/educ/reid/Geometry/Symmetry/frieze.html

Escher Patterns - Compiled by Yoshiaki Araki.
http://britton.disted.camosun.bc.ca/jbaraki.htm

Chaos Tiles - This chaotic tiling consists of two equilateral pentagons, with angles (80, 160, 60, 140, 100) and (40, 200, 60, 100, 140). Sets are for sale.
http://www.mathpuzzle.com/chaotile.html

William's Geometric Construction Page - Activities to create patterns using simple resources, such as making equilateral triangle from a circle. Suitable for upper primary and lower secondary ages.
http://www.cyffredin.co.uk/

Squared Squares and Squared Rectangles - Tilings of Squared Squares and Squared Rectangles, constructed using javascript.
http://www.squaring.net

Tessellation Links - Compiled by Suzanne Alejandre for the Math Forum.
http://mathforum.org/sum95/suzanne/links.html

Tessellations - A company selling foam puzzles, many based on planar tessellations (tilings) and fractals.
http://members.cox.net/tessellations/

17 Wall Paper Symmetry Groups to Create a Regular Division of the Plane - Graphics.
http://web.inter.nl.net/hcc/Hans.Kuiper/17system.htm

Catalogue of Isohedral Tilings - From the article "One Corona is Enough for the Euclidean Plane" by Doris Schattschneider and Nikolai Dolbilin.
http://mathforum.org/dynamic/one-corona/

Tessellations Using Geometer's Sketchpad - Description of a class project.
http://www.mste.uiuc.edu/courses/ci336kt/garrison/skpdindx.html

Tiling Plain and Fancy - Tiling from the mathematical and historical viewpoint by Steve Edwards. Provides a number of examples of various types of tiles that tile the plane and includes periodic tiling plus Penrose's aperiodic tiles.
http://www2.spsu.edu/math/tile/

Mike Field - University of Houston. Graphics and resources in symmetry and tiling.
http://nothung.math.uh.edu/~mike/

Wallpaper Groups - Images and descriptions of the 17 plane symmetry groups.
http://www.clarku.edu/~djoyce/wallpaper/

The Penrose Tiling at Miami University - A summary of the history behind the Penrose tiling in the math department at Miami university.
http://www.lib.muohio.edu/epub/tilings/doc.html

Tessellating Wallpaper Patterns - Original tessellating desktop wallpaper tiles.
http://www.geocities.com/hbafscl/tess1.html

Symmetry and the Shape of Space - With interactive demos using Geometer's Sketchpad (requires Macintosh).
http://comp.uark.edu/~strauss/symmetry.unit/

Tessellations: Technology and Culture - Examples and Java applets.
http://www.geocities.com/williamwchow/javagraf/javagraf.htm

TESS - Tessellation software. 11 rosette, all 7 frieze and all 17 wallpaper groups included.
http://www.peda.com/tess/

Tessellation Tutorials by Suzanne Alejandre - Tutorials and templates for making tessellations using ClarisWorks, the Geometer's Sketchpad, HyperCard, HyperStudio, and straightedge and compass, including step-by-step instructions for classroom activities.
http://mathforum.org/sum95/suzanne/tess.intro.html

Artlandia SymmetryWorks - Adobe Illustrator plug-in that automates creation of surface designs and ornaments based on seventeen wallpaper groups. On-line purchase.
http://artlandia.com/products/SymmetryWorks/

Totally Tessellated - An introduction to tessellations explaining the basic underlying mathematics, and with many examples from real life.
http://library.thinkquest.org/16661/

Quasi-Periodic Tilings - Artist Eleni Mylonas uses tilings.
http://www.elenimylonas.com/

Tessellated, Interlocking Concrete Pavers and Molds - Pictures of some concrete tilings.
http://www.geckostone.com/pavers.html

Intriguing Tessellations - By Marjorie Rice. Pentagons that tile the plane. Includes details and links.
http://tessellations.home.comcast.net/~tessellations/

Hyperbolic Tessellations - Explanations and graphics.
http://aleph0.clarku.edu/~djoyce/poincare/poincare.html

The Geometry Junkyard: Tilings - A collection of links.
http://www.ics.uci.edu/~eppstein/junkyard/tiling.html

The Seventeen Wallpaper Groups - Examples in traditional Japanese patterns.
http://mathmuse.sci.ibaraki.ac.jp/pattrn/PatternE.html

Discrete Plane Symmetry Groups - Web text by Ana Kozomara.
http://www.mi.sanu.ac.yu/vismath/ana/

The 14 Different Types of Convex Pentagons that Tile the Plane - Graphics and references.
http://www.mathpuzzle.com/tilepent.html

Investigating Patterns: Symmetry and Tessellations - Links to activities and other resources.
http://britton.disted.camosun.bc.ca/jbsymteslk.htm

Java Kali - A program for drawing symmetrical patterns based on any of the 17 wallpaper groups, as well as several frieze and rosette groups.
http://www.geom.uiuc.edu/java/Kali/

Tessellation and Photography - A study for the endless possibilities of tessellating the plane based on the work of Dutch graphic artist M.C. Escher.
http://members.home.nl/wouternimmo

Symmetry and Pattern: The Art of Oriental Carpets - Resources compiled by the Math Forum.
http://mathforum.org/geometry/rugs/

KaleidoTile - Software for Macintosh and SGI to create and manipulate tessellations of the sphere, Euclidean plane and hyperbolic plane, and to see how the Platonic solids are related to tessellations.
http://www.geom.uiuc.edu/software/download/KaleidoTile.html

Java Penrose Tiler - A Java applet for experimenting with kites and darts.
http://www.geocities.com/SiliconValley/Pines/1684/Penrose.html

Symmetries, Patterns and Tessellations - Constructed with Geometer's Sketchpad by Allan Bergmann Jensen. [French, English]
http://www.geometer.mb.dk/tess/index.htm