Absolute GIF Optimizer is a nice utility designed to easily optimize GIF graphics for your Website. Savings of up to 50% or more in file size are possible, which can considerably decrease web page download times, save on disk space and reduce bandwidth charges. Just add images to a project and select Test to preview the difference in file size. The cumulative total is also shown in addition to the difference for each individually. If you want to go ahead, just select Optimize to carry out the task. Many of the files will be significantly smaller with no difference in quality.