Downloading LUTGallery 1.1 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The software lies within Design & Photo Tools, more precisely Viewers & Editors.
This Mac app is an intellectual property of Color Grading Central LLC. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
LUT Gallery provides real-time previewing of look-up tables. Instead of scrolling through an endless list of look-up tables, now they are at your fingertips. Because of this, it allows you to focus more of your time on creativity. The tool can perform automatically white balance corrections based on objects that you select.
You may want to check out more Mac applications, such as Vectorworks 2010 Viewer, DropImageURL or Polaris, which might be similar to LUTGallery.