The 3.3.19 version of ColorWorkshop for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. ColorWorkshop for Mac lies within Design & Photo Tools, more precisely Viewers & Editors. We recommend checking the downloaded files with any free antivirus. This free Mac application was originally produced by ColorDigital. The following version: 3.3 is the most frequently downloaded one by the program users.
From the developer:
ColorDigital is a software for digital color design in architecture, design, fashion, textiles and interior. This software supports the DMIx workflow and therefore gives you the best result in color accuracy available at any point between design and production.
You may want to check out more Mac applications, such as Vectorworks 2010 Viewer, DropImageURL or Polaris, which might be similar to ColorWorkshop.