IrfanView is a fast, simple image viewer and editor that supports all major graphic formats, including BMP, DIB, JPEG, GIF, animated GIF, PNG, PCX, multipage TIFF, TGA, and more. In addition, it features drag-and-drop support, directory viewing, TWAIN support, slide shows, batch conversion, and modifications such as color depth, crop, blur, and sharpen. The IrfanView PlugIns package offers additional file formats and effects for IrfanView.
IrfanView is trying to create new and/or interesting features in its own way, unlike some other graphic viewers, whose whole “creativity” is based on feature cloning, stealing of ideas and whole dialogs from ACDSee and/or IrfanView! (for example: XnView has been stealing/cloning features and whole dialogs from IrfanView, for 7+ years).
IrfanView was the first Windows graphic viewer WORLDWIDE with Multiple (animated) GIF support.