Artlandia SymmetryWorks is an Adobe Illustrator plug-in that lets you make
repeat patterns in seconds.

SymmetryWorks is now in Version 4, which adds new and exciting features that
automate your work even further. Many classes of patterns are now faster
than ever to create. Others were simply not imaginable before. Spirals,
mosaics, gradations, checks, eccentrics, as well as guilloche, optical,
rotational, all-over, and tossed patterns are among those that have become
much easier and more fun.

New Features in Artlandia SymmetryWorks 4

* Replicas (live copies) of selected objects
* Addition and removal of objects from replicas
* Enhanced support for all-over and tossed repeats
* New multi-replica feature for automatic generation of replica copies
* Editable spirals, mosaics, gradations, and other arrangements in patterns

* Automatically generated check patterns, eccentrics, guilloche backgrounds,
and other linework
* New capabilities for creating optical, moire, and other special effects

* Rotational designs (pinwheels) of any order
* Support for applying live effects to replica art
* Replicas of hidden objects for creating counterchanged designs and
sophisticated effects
* Combination layouts
* Full support for Illustrator CS3

http://www.artlandia.com