The 1.3.3 version of nnScreenshots 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. NnScreenshots for Mac lies within Productivity Tools, more precisely Timekeeping. 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.
From the developer:
Benefits
Built in timesheet entries — create your timesheet entries and export them right inside the program. The app can even calculate the duration of each task for you automatically.
Bundle support — built in bundles for ClickTime and CSV exporting, write your own bundles to easily support any format.
Easy to use timeline interface — scrub through your day, like watching a video. See gaps in your activity immediately.
You may want to check out more software for Mac, such as Quote of the Day, Opera Clock or Hypnotic Clock, which might be similar to nnScreenshots.