Phatch is a simple to use cross-platform graphical Photo Batch Processor with a nice graphical user interface.
Phatch handles all popular image formats and can duplicate (sub)folder hierarchies.
Phatch can batch resize, rotate, rename, … and do much more actions in minutes instead of hours or days if you do it manually.
Phatch will also support a console version in the future to batch photos on
...Licence : GPL 
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