You could have downloaded SalStat 2.1 for Mac from our software library for free. The actual developer of this free software for Mac is SalStat. The application is included in Design & Photo Tools.
From the developer:
SalStat is a small application for statistical analysis emphasising the sciences and social sciences (particularly Psychology). This easy to use open source application has 9 forms of quantile along with a full range of parametric and nonparametric tests.
You may want to check out more software for Mac, such as WSSlideshowConfigurator, 4Easysoft iPhone 4G Ringtone Creator for Mac or Winscape, which might be related to SalStat.