IrfanView
A fast and compact image viewer and converter.
Simple enough for beginners, but powerful enough for professionals, IrfanView image viewer and converter supports many different file formats. IrfanView's key features include multi-language support, thumbnail option, painting, slideshow, toolbar skins, fast directory browsing, batch conversion/editing, multipage editing, file search, change color depth, scanning, cut/crop, IPTC edit, capturing, lossless JPG operations, effects, ICC support, EXE/SCR creating, many hotkeys, and command line options and plugins.
