Color Cleaner

Just drop an image on the program, pick a color and make it transparent (or replace with one of your choice).

Simple tool designed with spritesheets in mind. Sometimes you find some online and wat to get rid of  the color used as background. Instead of opening it in any image editor, pick the color, make the layer transparent, save it maybe with a new name, ColorCleaner does it in less steps and also suggest a suffix to the filename to keep the original one untouched if you want.