It's called Macphun. The two modules that I like best are called "Intensify" and "Tonality". Intensify is a layers-based application that allows you to do incredible things with your photos. Tonality is an app that does B&W conversions, again it is incredible. There are lots of YouTube tutorials available, take a look. The entire package is very inexpensive. It can be used as a Photoshop, Lightroom and Aperture plug-in or as a standalone program.