StackTop 3.0.1 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.
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 application lies within System Tools, more precisely Automation. The actual developer of this free software for Mac is Stack Exchange Inc. Stacktop3.0.1b.zip is the most frequent filename for this application's installer. StackTop was developed to work on Mac OS X 10.6 or later. The most popular version of the program is 3.0.
From the developer:
Stacktop is a Mac client for accessing most of the Stack Exchange sites. This is an auto-search app where you input keywords every 10 minutes or so it'll search SO and tell you if there are any questions that haven't been answered that are about whatever your tags are.
You may want to check out more software for Mac, such as iPAD, America's Army 3 or autoconf, which might be similar to StackTop.