Slide Freebie for Mac is included in Design & Photo Tools.
From the developer:
Slide Freebie Features: Drag And Drop of Source Folder Reverse Auto Advance Loop Image Effects! File Conversion File Renaming File Trashing Neat Graphics Ease Of Use Cheap
You may want to check out more Mac applications, such as Volume Slider, WOW Slider or Brightness Slider, which might be similar to Slide Freebie.
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3D Design