Andrews Handy Page: Scripts and tips, shapefile fixer and repairer, theme manager.
APR Director: ArcView extension for managing ArcView project (.apr) files. Shareware from Latitude Geographics Group Ltd., Canada.
ArcView Extensions: Theme locator, AV Salvage, AV Archive and other shareware and freeware extensions and utilities by GeoSnap Software.
AVPython: Python Language Support for ArcView GIS: Allows use of the Python programming language to customize ArcView GIS.
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.
Benchmark GIS: GIS consulting services, extensions for ArcView GIS, GIS training courses, and free scripts.
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.
EasySVG: Interactive mapping tool. It allows anyone to publish high quality, fully interactive maps on the internet, intranet, CD-Rom and DVD.
ECOGIS Geomatics: Freeware and shareware tools, like CAD2Shapes (extension to convert DXF graphics into shapes) or Polytool (a helpful tool for constructions).
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.
Gateway Mapping, Inc.: Various extensions for managing ArcView GIS. Demos for testing (limited in size of themes and/or tables) available for download.
Geokinectic Systems Inc.: The commercial "theEngine" extension transforms ArcView into a combination of Arc/Info and CAD.
GeoSnap Software: Offers extension to repair damaged ArcView project files. Also offers consulting services.
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.
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.
Ianko's GIS page: Ianko Tchoukanski's page presenting his freeware and shareware ArcView extensions.
Internet Map Wizard: ArcView extension that converts ArcView 3.1 (or higher) projects into website.
Jenness Enterprises: Offers a number of free, custom-built ArcView applications for the ESRI ArcView GIS system
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.
MapWares: ArcView and ArcGIS custom tools and extensions. Upgrades from Avenue to Visual Basic.
Maui GIS Free ArcView Resources: Links to ArcView resources available for free.
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.
Public Domain extensions: Review and rating of the most useful PD extensions for ArcView GIS
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.
Spatial Online: Site for ESRI ArcView users and developers. Provides a free evaluation and secure purchase of ArcView extensions and spatial applications.
Tools at Directions Magazine: Library of software tools hosted by an online GIS magazine. Not limited to ArcView, but very good search facilities.
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.
XTools Extension: Suite of tools to enhance ArcView. Very popular public domain extension.
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.