Many years ago we ported Pete Warden's FreeFrame plugins so they would work on Mac OS as well as Windows.
You can still use these FreeFrame v1.0 plugins with version 2 of Isadora, but they are not compatible with version 3 because Isadora 3 is a 64-bit application, and these plugins are 32-bit.
In addition, these plugins are not recommended because they are CPU based and will give poor performance with HD video.
With that in mind, if you need these plugins for Isadora 2 you can get them here.
Pete Warden's FreeFrame Plugins (Macintosh)
Pete Warden's FreeFrame Plugins (Windows)
Pete Warden's FreeFrame Plugins (Source Code as Macintosh .dmg file)
The installer includes these plugins: