Download of ColorBot 2.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This Mac application was originally designed by mDimension Technology, LLC. We recommend checking the downloaded files with any free antivirus. The program lies within Lifestyle Tools, more precisely Bookkeeping & Cataloging.
From the developer:
ColorBot remembers every color you capture, and then lets you organize those colors. You can hit a hotkey to store the color under the mouse to the recent colors list, even when ColorBot isn't the active app. The program allows you organize colors into swatches, palettes, and groups.
You may want to check out more software for Mac, such as BookTracker, Statistics Pro Demo or Reunion, which might be similar to ColorBot.