HDREffects 2.0 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. This Mac app was originally developed by HumanSoftware. The application lies within Design & Photo Tools, more precisely Viewers & Editors.
From the developer:
HDREffects lets you create rich HDR effect images from a single image. With this app you can also reveal the details you thought of as lost in dark images.
Main features:
- Change your overall hue, saturation, lightness and brush back your original image.
- Ability to flip image horizontally and vertically.
You may want to check out more software for Mac, such as Cuadro or Resize Now, which might be related to HDREffects.