Download ESRI ArcGIS tools and Extensions

Batch Geocode 
http://www.batchgeocode.com/ 
Locate multiple addresses internationally - North America & Europe - calculate distances - make your own mashup map - instantly. 

Brava! DWG Viewer 
http://www.bravaviewer.com/viewers.htm 
A free tool for viewing and measuring DWG, DXF, and DWF files. 

Corpscon
http://crunch.tec.army.mil/software/corpscon/corpscon.html 
"An MS-Windows-based program which allows the user to convert coordinates between Geographic, State Plane, Universal Transverse Mercator (UTM) and US National Grid systems on the North American Datum of 1927 (NAD 27), the North American Datum of 1983 (NAD 83) and High Accuracy Reference Networks (HARNs)." 

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DS Map Book 
ESRI Developer Network link 
"This Developer Sample code is designed to allow for the creation of Map Books. A page is created in the book based on each feature in a grid/index layer specified by the user. Index layers must contain polygon features with a string field containing the name of each tile/page. The features in the index layer do not have to be of any particular size or shape, nor do they need to be continuous or non-overlapping. Several commands are included for generating index layers based on a uniform grid or based on selected, continuous line features" 

Edit Tools 
http://www.ian-ko.com/ 
A reference for tools (ET GeoWizard, free calculators, etc.) and resources. 

Hawth's Tools 
http://www.spatialecology.com/htools/tooldesc.php 
A ton of custom tools for ArcGIS, including: analysis, raster, sampling, tables, editing, and more! 

SmartExporter
http://arcscripts.esri.com/details.asp?dbid=14823
Export your layout/map to DXF with this export filter created for ArcMap 9.1/9.2! 

TerraServer Download Tool 
http://arcscripts.esri.com/details.asp?dbid=14816 
This is a valuable tool! Once installed, it makes a new toolbar available in ArcMap. With the toolbar open, click the TerraServer button and it will download imagery hosted by TerraServer (http://terraserver.microsoft.com) directly into ArcMap. This is a great way to acquire aerial imagery for an area, or simply get a better idea of where your data is located. 

XTools Pro 
http://www.xtoolspro.com/ 
A great extension for geoprocessing. With this you can do some things that would otherwise only be available at the ArcEditor or ArcInfo license level. It is priced at less than $200. Check to see if your company already has it available for you to use.

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EXTENSIONS

Add more capabilities to ArcGIS for Desktop with extensions. These specialized tools allow you to perform more sophisticated tasks such as raster geoprocessing and 3D analysis.

* Requires ArcGIS for Desktop Standard or Advanced ** Starting with the release of ArcGIS 10.1, this extension is included with ArcGIS for Desktop at no extra cost. *** Requires ArcGIS for Desktop Advanced Note: Unless noted, extensions can be used with ArcGIS for Desktop Basic, Standard, and Advanced.
ArcGIS 3D Analyst	Analyze your data in a realistic perspective.
ArcGIS Geostatistical Analyst	Use advanced statistical tools to investigate your data.
ArcGIS Network Analyst	Perform sophisticated routing, closest facility, and service area analysis.
ArcGIS Schematics	Represent and understand your networks to shorten decision cycles.
ArcGIS Spatial Analyst	Derive answers from your data using advanced spatial analysis.
ArcGIS Tracking Analyst	Reveal and analyze time-based patterns and trends in your data.
Business Analyst Online Reports Add-In	Directly access demographic reports and data from Business Analyst Online (BAO) for trade areas and sites created in the desktop.
THANKS FOR MAKING DONATION BY CLICKING SOME ADS  Productivity	Key Benefits
ArcGIS Data Interoperability	Eliminate barriers to data use and distribution.
ArcGIS Data Reviewer	Automate, simplify, and improve data quality control management.
ArcGIS Publisher	Freely share your maps and data with a wide range of users.
ArcGIS Workflow Manager*	Better manage GIS tasks and resources.
ArcScan for ArcGIS**	Increase efficiency and speed up raster-to-vector data conversion time.
Maplex for ArcGIS**	Create maps that communicate more clearly with automatically positioned text and labels.
Solution Based	Key Benefits
ArcGIS Defense Solutions (includes ArcGIS Military Analyst, Grid Manager, and MOLE)	Create workflows, processes, and symbology to support defense and intelligence planning.
ArcGIS for Aviation*	Use the full power of GIS to efficiently manage aeronautical and airports information.
ArcGIS for Maritime*	Gain value from bathymetry and leverage nautical data beyond charting.
Esri Defense Mapping***	Efficiently manage defense specification-compliant products.
Esri Production Mapping*	Standardize and optimize your GIS production.
Esri Roads and Highways*	Easily manage, visualize, and analyze transportation networks.

No-Cost Add-ons

These free add-ons provide special tools for specific tasks. You can download them directly to your desktop and begin using them right away.

No-Cost Add-ons	Key Benefits
ArcGIS Editor for OpenStreetMap (download)	Contribute to the OpenStreetMap project by adding, editing, and deleting data within the familiar ArcGIS 10 editing environment.
ArcSketch (download)	Quickly create features in ArcGIS with easy-to-use sketch tools.
Districting for ArcGIS (download)	Create defined groupings of geographic data, such as census tracts, ZIP Codes, and precincts, by creating a districting plan.
Esri S-57 Viewer (download)	Visualize S-57 data in compliance with S-52 standards and specifications for chart content and display aspects.
Free Geoportal Add-ons (download)	Catalog geospatial resources within an enterprise and provide quick access to those resources regardless of location or type.
OLAP for ArcGIS (download)	Create, view, use, and manage connections to OLAP databases in ArcGIS for Desktop.
U.S. National Grid Tools for ArcGIS (download)	Support disaster relief and search and rescue with a coordinate system that can be standardized across agencies.
WMC Client (download)	Open Web Map Context (WMC) files directly in ArcMap.

Read more about ArcGIS for Desktop extensions [PDF].

Source http://www.esri.com

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