This plugin create a fading effect for image on mouse over. In addition, you can select a color tone filter for your images. The tone is set for the images, when they are not hovered. When it is hovered, the color tong filter will be removed, so that there is a clear distinction between this selected image and other non-selected images. You do not need to prepare multiple sets of images, also you can change the color tone using javascript.
Image Effects Plugins