Rename 

This purpose of this program is to rename image files obtained from digital cameras, scanners, etc.. All image files in a given folder may be renamed or only image files in the folder that match a selected file type.
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UniView 

UniView is a powerful image viewer, converter and manipulation tool. It support 50+ most popular image formats. It also intergates many functions, including encrypt images,batch convert and rename image files, animation controls and html album maker.
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