This is a plugin for either Photoshop or Lightroom I use on most photos before posting them to the web. It has a bunch of "effects" that I apply to my photos. A bit hard to explain without seeing them but you can checkout their website for examples and a free trial. I like using this software because it is really easy, to make improvements, I can do more in 5 minutes with Color Efex pro than I can with Photoshop. That could be because I am slow with Photoshop but I think it is more that the Color Efex Pro interface is made for photographers and really intuative. By far my favorite effect is the "tonal contrast" effect. It improves almost every photo.