Gateway Mapping, Inc.
- Various extensions for managing ArcView GIS. Demos for testing (limited in size of themes and/or tables) available for download.
- http://gmisoftware.stores.yahoo.net/arcviewscripts.html

MapViewSVG
- Extension for ArcGIS 8.x/9.x or ArcView GIS 3.x by ESRI that gives the opportunity to convert maps into the SVG format.
- http://www.mapviewsvg.com/

EasySVG
- Interactive mapping tool. It allows anyone to publish high quality, fully interactive maps on the internet, intranet, CD-Rom and DVD.
- http://www.qinetiq.com/easysvg

ECOGIS Geomatics
- Freeware and shareware tools, like CAD2Shapes (extension to convert DXF graphics into shapes) or Polytool (a helpful tool for constructions).
- http://www.ecogis.de/download_en.html

MapWares
- ArcView and ArcGIS custom tools and extensions. Upgrades from Avenue to Visual Basic.
- http://www.mapwares.com

GeoSnap Software
- Offers extension to repair damaged ArcView project files. Also offers consulting services.
- http://www.geosnap.com/

NOAA Coastal Services Center
- ArcView Metadata Collector v2.0 Extension, an easy-to-use application that helps the ArcView 3.x user to create Federal Geographic Data Committee (FGDC)-compliant metadata.
- http://www.csc.noaa.gov/metadata/text/download.html

Geokinectic Systems Inc.
- The commercial "theEngine" extension transforms ArcView into a combination of Arc/Info and CAD.
- http://www.geokinetic.com/

EZClick Tools Extension for ArcView 3.x
- Tool for building spatial indexes for geographic vector and raster data distributed over various directories. Helps to quickly load and manage data for any given window. Shareware.
- http://raynerhoward.com/

HTML ImageMapper
- This ArcView extension from alta4 is a tool to translate views directly into clickable maps in HTML format. Available for ArcView 3.x and now also for ArcGis 8.x. Free download of trial version available.
- http://www.alta4.com/index_engl.htm

ZEBRIS Webview
- Webview is a tool for conversion of ArcView maps into inter-active HTML pages. Available in 3 versions: Light, Standard and Professional. Free evaluation copy can be downloaded.
- http://www.zebris.com/english/main.htm

XTools Extension
- Suite of tools to enhance ArcView. Very popular public domain extension.
- http://www.odf.state.or.us/DIVISIONS/management/state_forests/GIShome.asp

Visual Learning Systems, Inc.
- VLS has developed the Feature Analyst as a premiere image processing tool for ESRI's ArcView and ArcGIS, which utilizes machine learning techniques to extract features from satellite and aerial imagery.
- http://www.vls-inc.com

Jenness Enterprises
- Offers a number of free, custom-built ArcView applications for the ESRI ArcView GIS system
- http://www.jennessent.com/arcview/arcview_extensions.htm

ArcView Extensions
- Theme locator, AV Salvage, AV Archive and other shareware and freeware extensions and utilities by GeoSnap Software.
- http://www.geosnap.com/Main.htm

Barr Resources
- Three freeware ArcView extensions (Polygon tool for digitizing, Table wizard and Map tips) provided free by the US Engineering company Barr Information Technology Services.
- http://www.barr.com/ClientRe/GIS/Downloads.htm

Ianko's GIS page
- Ianko Tchoukanski's page presenting his freeware and shareware ArcView extensions.
- http://www.ian-ko.com/

Quantitative Decisions
- Site of Bill Huber's company, a guru in Avenue and ArcView extensions. Freeware or shareware at very reasonable prices. Mathematical explanations rarely found on other ArcView sites.
- http://www.quantdec.com/

Tools at Directions Magazine
- Library of software tools hosted by an online GIS magazine. Not limited to ArcView, but very good search facilities.
- http://www.directionsmag.com/tools/

CEDRA Corporation Parcel Mapping Solutions for GIS
- An ArcView extension which includes and expands upon CEDRA AVcad to provide tax (cadastral) mapping, parcel mapping and maintenance and general polygon editing.
- http://www.cedra.com/AVparcel.html

Public Domain extensions
- Review and rating of the most useful PD extensions for ArcView GIS
- http://www.disk-world.net/AVDOCS/AV_extensions.htm

AVPython: Python Language Support for ArcView GIS
- Allows use of the Python programming language to customize ArcView GIS.
- http://avpython.sourceforge.net/

APR Director
- ArcView extension for managing ArcView project (.apr) files. Shareware from Latitude Geographics Group Ltd., Canada.
- http://www.aprdirector.com/

Maui GIS Free ArcView Resources
- Links to ArcView resources available for free.
- http://www.maui.net/~mauigis/avhelp1.html

Spatial Online
- Site for ESRI ArcView users and developers. Provides a free evaluation and secure purchase of ArcView extensions and spatial applications.
- http://www.spatial-online.com/

GIS Short Course Handouts
- Basic information for Arcview and Avenue scripting by the University of South Carolina. Several handouts available, formats are PDF, Powerpoint ot HTML.
- http://www.cla.sc.edu/GIS/training/handouts.html