Tadam 3.0 for Mac could be downloaded from the developer's website 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 application lies within Productivity Tools, more precisely Timekeeping. The actual developer of this Mac application is Radosław Pietruszewski.
From the developer:
Tadam is a timer that stays out of your way and lets you get the work done. It's simple, it has few buttons, few features and no configuration. In Tadam, when the time runs out, it doesn’t immediately ring. Instead, the app icon starts pulsing, so you know you need to hurry up.
You may want to check out more software for Mac, such as Tadama, which might be similar to Tadam.