Downloading ArcGIS Explorer Desktop Projection Engine Expansion Pack 10.1.2500 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus.
The following versions: 10.1 and 10.0 are the most frequently downloaded ones by the program users. The actual developer of the free software is Environmental Systems Research Institute, Inc. ArcGIS Explorer Desktop Projection Engine Expansion Pack works fine with 32-bit versions of Windows XP/Vista/7/8/10/11. The program belongs to Internet & Network Tools.
From the developer:
This program adds more projections and geotransformations for use with ArcGIS Explorer Desktop. The ArcGIS Explorer setup is intended for users who have administrator access on their computers or are using other ArcGIS products. It uses a web-based help system.
You may want to check out more software, such as ArcGIS for Desktop Oracle Geodatabase Object Schema Update and Editing Patch or ArcGIS for Desktop, which might be related to ArcGIS Explorer Desktop Projection Engine Expansion Pack.
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