The Portable Freeware Collection ⋆ FGR* Blog
IrfanView is a viewer for a wide variety of image, audio and video formats. The program includes batch processing, creation of panoramic images, edition of multi-page TIFF files, lossless JPEG rotate/crop and effects such as sharpen and blur. Other tools such as screen capture, scanner, slideshow, plugin support and ability to capture icons from EXE or DLL.
Alternatively, IrfanView Portable is also available and updates drive letters and handles registry keys.