Download of FinalShot 2.6.5 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This software for Mac OS X was originally designed by wegenerlabs. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The software lies within Design & Photo Tools, more precisely Screen Capture.
From the developer:
FinalShot is an application that lets you take screenshots of your screen. It can save your screenshots into a folder you choose or copy your screenshots into your clipboard so that you can paste them into any other app. You can take a screenshot of your full screen or a specific area. To capture a specific area, you simply select the top left corner and drag your cursor to the bottom right corner to outline the area to be captured.
You may want to check out more software for Mac, such as ScreenRecord Studio, Screen Mimic or Sequence, which might be similar to FinalShot.