The 1.1.1 version of Big Window Clock 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. This free Mac application was originally developed by Mobile Geographics. We recommend checking the downloaded files with any free antivirus. The program belongs to Productivity Tools.
From the developer:
Big Window Clock shows the current time, in your Mac's time zone, in the largest possible font for its window. Optionally, it makes a "tick" sound periodically.
You can use Big Window Clock to measure audio/video sync drift, where your audio and video capture devices don't run at precisely the same speed. You need to point your camera at the screen, enable the periodic "tick", and check your sync drift after an hour or so.
You may want to check out more software for Mac, such as Big Red Clock, Big Clock or Big Ideas Math, which might be related to Big Window Clock.
Timekeeping
Timekeeping