ERDAS ECW for ArcGIS Desktop
You can download ERDAS ECW for ArcGIS Desktop 14.00.0.152 from our software library for free. This free software is a product of ERDAS, Inc. The most popular versions of the tool are 11.1 and 11.0. This PC program can be installed on 32-bit versions of Windows 7. ERDAS ECW for ArcGIS Desktop relates to Photo & Graphics Tools. The program's installer is commonly called FixManager.exe.
From the developer:
Many applications support large JPEG 2000 and ECW image files natively. However, for those applications that haven't yet implemented support for gigabyte and terabyte size geospatial images we provide many application plugins so that you can easily use large JPEG 2000 and ECW format images in your GIS, CAD or Office software.
You may want to check out more software, such as ArcGIS Desktop Tutorial Data, G2G for ArcGIS Desktop or ArcGIS Desktop Geocoding Memory Leak and Matching Quality Patch, which might be related to ERDAS ECW for ArcGIS Desktop.