CameraBag 3.1 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program is included in Design & Photo Tools.
This software for Mac OS X was originally produced by Nevercenter Ltd. Co. 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:
CameraBag is a desktop photo app with a whole new approach to photos. Redesigned from the ground up, CameraBag's Analog Engine pairs a full suite of photographic tools with the high quality filters and vintage simulations the series is already known for. Its key innovation is a stunningly straightforward approach to layering, rearranging, and endlessly tweaking all of these effects in realtime.
You may want to check out more software for Mac, such as CameraBag 2, which might be similar to CameraBag.