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

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

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

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

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

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

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

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

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

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

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

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

Investigating Patterns: Symmetry and Tessellations  
   Links to activities and other resources.
   http://www.camosun.bc.ca/~jbritton/jbsymteslk.htm

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

Intriguing Tessellations  
   By Marjorie Rice. Pentagons that tile the plane: details and links.
   http://members.aol.com/tessellations/

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/

Tessellations  
   A company selling foam puzzles, many based on planar tessellations (tilings) and fractals.
   http://www.tessellations.com/

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

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

Tilings, Tessellations and Other Unusual Prints  
   Images and links by Peter Raedschelders.
   http://home.planetinternet.be/~praedsch/

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

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

Alex Bateman's Origami  
   Tessellation images and software.
   http://www.sanger.ac.uk/Users/agb/Origami/origami.html

Escher Patterns  
   Compiled by Yoshiaki Araki.
   http://www.sfc.keio.ac.jp/~aly/escher/

Gallery of Symmetric Chaos  
   Includes: Symmetric icons and fractals; Quilts and planar repeating patterns; Colored wallpaper patterns.
   http://nothung.math.uh.edu/~mike/ag/art.html

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

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

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

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

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/

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

Tessellated, Interlocking Concrete Pavers and Molds  
   Pictures of some concrete tilings.
   http://www.geckostone.com/pavers.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.cs.washington.edu/homes/csk/tile/

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

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/

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

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

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

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

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

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

Symmetries, Patterns and Tessellations  
   Constructed with Geometer's Sketchpad by Allan Bergmann Jensen.
   http://www.geometer.dk/tess/

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

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 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/

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

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

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

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