The following list gives links to other developers, in alphabetical order, and their Adobe Illustrator plugins.
Note some plugins are only for older versions of Illustrator and some are for PC or Mac only. Please read developer's website for full details of each plugin.

- Abneil Software Ltd.
www.graphicxtras.com
- Andrew's Vector Plugin Collection
An extensive pack of vector shape creation tools also available
individually
- AGE Technologies, Inc.
www.agetechnologies.com
- ArtLibrary
Produce an unlimited number of sketches and artwork libraries
- ColorTools
Create and manage color story boards
- AppliCraft
www.applicraft.com
- CADgate
DXF, DWG and IGES CAD file conversion - also available from Hot
Door, Inc.
- Artlandia
www.artlandia.com
- SymmetryWorks
Make repeat patterns
- LivePresets
Live pattern swatches or symbols
- Avenza Systems Inc.
www.avenza.com
- MAPublisher
Bridges the gap between Geographic Information Systems (GIS) and
high-end graphic design and publishing of maps
- Baby Universe
www.baby-universe.co.jp/plug-in/
- Serial Barcode
Barcode generator (Japanese only)
- CAD-COMPO
CAD tools with DXF file exchange (Japanese only)
- AIPLOT-Pro
Plotter driver (Japanese only)
- TypeSet-Pro
Japanese type setting (Japanese only)
- BlitzTools
www.blitztools.com/plugins/illustrator.html
- Barcode Plugin for Adobe Illustrator CS 3
Create all common linear and 2D area barcodes
- Code Line
www.code-line.com/software/artfiles.html
- Art Files
Not strictly a plugin, but a Mac OS X utility to collect all files associated with an Illustrator file
- Comnet Corporation
www.comnet-network.co.jp
- FoldUP 3D
Packaging and dimesional design allowing preview of folded package
or print design in 3D - also available from Hot
Door, Inc.
- LogoSpruce
Tracing plugin which also offers path alignment and tidying
- NiceCut / Pro
Vinyl cutting sign making system
- Slim Point
Eliminate unnecessary anchor points, making files smaller
- CValley, Inc.
www.cvalley.com
- FILTERiT
FILTERiT is a plug-in suite which features various exciting and
unique effects
- Xtream Path
Drag, stretch, push and pull... you can do a lot with paths
- Digital Graphic Solutions
www.flexocase.com
- Flexocase
Produce templates for folded cardboard boxes
- Repro Tools
Place print alignment marks on your page
- InkGuide
Calculate ink usage
- Borders
Calculate print plate cost by coverage
- Elysium Co. Ltd.
www.elysium.co.jp
- 3D-Tiger
Visualize and edit 3D CAD surface data - also available from POSH
GmbH
- Enfocus
www.enfocus.com/product.php?id=3166
- Instant Barcode
Barcode generation and verification
- Esko-Graphics
www.esko.com
- boostX
Accelerate frequently used selection and alignment operations and
add new ways to handle spot colors and special inks
- checkX
File preflight for print
- trapX
Advanced trapping control
- barX
Automatically generate barcodes, with checks and balances to assure
the correct code is printed accurately
- viewX
Visually inspect your packaging design
- OutRight
Match between every proof, film or plate, no matter what PDF level
or PostScript RIP or imaging device is used
- stepX
Create step and repeat arrangements ideal for label printers
- ArtiosCAD import and export
Import and export native ArtiosCAD files
- FreeSoft s.a.
www.silhouetteonline.com
- Silhouette
Bitmap to vector tracing with manual detail control
- Hot Door, Inc.
www.hotdoor.com
- CADtools
Draw in any scale, easily dimension artwork and numerically control
size and location of objects or points
- MultiPage
Adds multipage functionality
- Perspective
Isometric, oblique, and perspective drawing tools
- Jean-Louis
Garrivet
http://perso.orange.fr/jlg.outils/
- Various
A selection of CAD-type and uniform vector creation tools
- Jürg Lehni
www.scriptographer.com
- Scriptographer
Extensive scripting plugin giving the user the possibility to extend Illustrator's functionality by the use of the JavaScript language
- Michael Swanson
www.mikeswanson.com/XAMLExport/
- XAML Export
Export directly to WPF ("Avalon")/XAML
- New Ceres Solution
www.magisign.com
- NCS MagiSign
Create, select, setup and cut signs
- Nineblock Software
www.nineblock.com
- SnapMeasure
Advanced measurement tool
- BetterHandles
Create and edit Bezier curve handles
- Moan, Inc.
www.moam-inc.com
- QwikMarx
Produce layout dimensions
- Panopticum LLC
www.panopticum.com
- Array
Create complicated geometrical patterns
- Vectorizer
Convert a raster image into vector image with defined contour precision
- Pantone®, Inc.
www.pantone.com
- HexVector®
Convert vector graphics and line art to Hexachrome
- Pulse Microsystems Limited
www.embroideryi2.com
- Embroidery i2
Create embroidery using Illustrator
- Rick Johnson/Graffix
http://rj-graffix.com/software/plugins.html
- Concatenate
Filter that connects two or more paths into one continuous path
with options
- Nudge Palette
Allows you to adjust the position of a patterned fill within an
object or dash pattern along a path
- Square-Up
Convert a selected path's anchor points to corner points, and square-up
lines
- Select
Adds 18 additional object types under the Select menu
- Cutting Tools
Advanced path cutting and deletion tools
- Trackplan Tools
Quickly draw model railroad trackplans
- Proof Block
Creates a proof block for routing illustrations to editors and art
directors prior to publication
- Isometric Line Tool
Draws straight lines constrained to isometric angles
- Misc
Other small (and free) or legacy plugins are available
- Shinycore Software
www.shinycore.com
- Path Styler Pro
Create bevel effects on your artwork
- Stephen Vincent
http://members.shaw.ca/spvincent/plugins/
- Mesh Utils
Adds eight filters and one tool to create, colour, and manipulate
gradient meshes
- Kimbo
Tools including Mirror, Cut, Rectangle Cut, Tile and Rosette
- VTexture
Create natural-looking textures as Live Effects from gradient-filled
art
- Curvius
Additional filters Crenellate, Reverse Path, Roughen, Roulette,
Simplify, Smooth and Straighten
- Tessella
Create rectangular, rhombic, hexagonal and triangular patterns
- Point Tweaker
View and finely adjust the coordinates of path points
- Telegraphic
www.telegraphics.com.au
- Radial Distort Filter
Create a radial distortion of artwork
- Cylinder Distort Filter
Wrap artwork such as a lable around a cylinder or bottle
- Pathlength Filter
Computes the length/perimeter of paths
- Patharea Filter
Computes the area and length of Illustrator paths
- Pathtotext Filter
Exports a text file (tab delimited) of selected path co-ordinates
- Tooldemo
Example of a plugin tool which creates a logarithmic graph of a
simple function
- Triple Triangle Inc.
www.tripletriangle.com
- Mechanical Cubed
A suite of products (including Slug Cubed, Job Spec Cubed and Crop
Cubed - all available separately) for creating and maintaining mechanicals
including crop marks, fold marks and slugs
- Vertigo Software Corp.
www.vertigo3d.com
- 3D PopArt
3D extrusion of artwork and text
- 3D Words
Produce 3D text effects
- 3D Dizzy
Import 3D models, position, create lighting effects, control camera
view and choose from a number of rendering effects
- Virtual Mirror Corporation
www.virtualmirror.com
- Vector Studio
Creative filters including shape editing, texturing, advanced gradients
and textures and workspace management - also available from Hot
Door, Inc.
- Worker 72a
www.worker72a.com
Plugins available for Mac only (other plugins are available)...
- Scoop
Collect support files
- SepPreview
Preview color separations
- QuickCarton
Create corrugated carton dies
- Point Control
Path and point control functions
- Wriston Development
www.flexostep.com
- FlexoStep
Tool for packaging/label artwork including stepping, repeating and
distorting
- Zevrix Solutions
www.zevrix.com/artoptimizer.html
- ArtOptimizer
Reduce the size of images linked to Adobe Illustrator document
The following list gives links to scripts and script resources developed by third parties to extend the capabilities of Illustrator.
Even though scripts do not tend to provide extensive additional functionality, these small additions can prove invaluable and are often provided freely.
You may also wish to look at Jürg Lehni's freely available Scriptographer which gives an alternative scripting method and benefits from extensive support.
- Nathaniel Vaughn Kelso's Javascripts for Illustrator
www.kelsocartography.com/scripts/
- Multiple scripts by Nathaniel, John Wundes and Wolfgang Reszel
Nathaniel, a leading Illustrator professional user specialising in the field of cartography brings a great collection of very useful free scripts to enhance Illustrator
- John's Javascripts for Illustrator
www.wundes.com/js4ai/displayFilesWTemplate.pl
- Multiple scripts
A wide variety of free scripts handling text, placement, randomising and more
- Scripting Illustrator blog
http://js4ai.blogspot.com/
- Blog produced by John Wundes
Discussing the issues of scripting for Illustrator CS
- Les' forum posting
www.illustratortechniques.com/forum/showthread.php?t=58
- Placed artwork collection script
Posting on Illustrator Techniques forum