Cropping, editing, resizing, and adding text to images are various actions that bloggers and photographers constantly perform. The most popular tools used to perform these actions range from high-performance products like Adobe Photoshop to the free-for-all Paint.NET and GIMP applications. However, the start-up times for these products can waste precious seconds if you only need to perform one action. Here are three great programs for Mac and Windows to resize images on the fly.