DropScript X 0.5 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. The application lies within Theming Tools, more precisely Multiple Desktops. We recommend checking the downloaded files with any free antivirus.
From the developer:
DropScript lets you create new applications from any BSD program which takes files as command line arguments. Typically, these are scripts written in sh, perl, etc.
You may want to check out more software for Mac, such as DropScript or png2swf, which might be similar to DropScript X.