Downloading AppShots 1.0.3 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. We recommend checking the downloaded files with any free antivirus. The software belongs to Design & Photo Tools. This free software for Mac OS X is an intellectual property of Avid Coding.
From the developer:
AppShots offers an easy and fast way to take screenshots. Then, you can create all the scaled-sized images for submitting your applications to the App Store. All you need to do is drag and drop your images, choose a folder, and your new image will be created.
You may want to check out more software for Mac, such as Layers Shots, which might be related to AppShots.