Despite what Microsoft, Apple or Adobe may want you to think, there is still a great deal of great free software out there. One great example of this would be IrfanView. This program follows two of my favorite strategies: #1 K.I.S.S. (Keep It Simple Stupid) and #2 Compatibility is key. While this program may only be about 428kb it has just about every feature that I could think of in an image viewer. It's important to remember that IrFanView is an image VIEWER and not an image EDITOR. While it will do some fancy image editing effects, it's not Adobe Photoshop. But if you just want to look at a picture real quick this is the program for the job.