Compatibility
ContrastMaster works under Windows 98, NT, ME, 2000, XP, Vista as well as MacOS X. It supports 8bit RGB and 16bit RGB images.
You need one of the following applications to use the MacOS X versions:
Adobe Photoshop (Version 7 and higher)
... and it probably works in several graphics applications that support Photoshop plugins.
You need one of the following applications to use the Windows version:
Adobe Photoshop (Version 3 and higher)
It hasn't been tested, but should work with:
BananaSoft TwistedPixel