Downloading SwingSet2 2.0 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The application is categorized as Developer Tools. The most popular version among SwingSet2 for Mac users is 2.0. This free Mac application was originally developed by Oracle. 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:
The Swing API provides a comprehensive set of GUI (Graphical User Interface) components and services which enables the development of commercial-quality desktop and Internet/Intranet applications. Swing is built on top of many of the other Desktop Java technologies found on this page, including JavaBeans, AWT, Java2D, Accessibility, and Internationalization.
You may want to check out more software for Mac, such as CVSServerSetup, Mopho LE or jKaiUI, which might be similar to SwingSet2.