IrfanView is a fast and compact image viewer/converter. It is trying to be simple for beginners and powerful for professionals. Many supported file formats and features. Features include: multi-language support, Thumbnail option, 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 (sharpen, blur, Adobe Photoshop filters), EXE/SCR creating, many hotkeys, command line options and plugins.
Version 4 improved Vista compatibility. New display option: Center image in window. Toolbar skin option added (Properties->Toolbar). New Properties->Video option: Use DirectShow for playing (good for MJPG AVIs). New advanced batch option: Auto adjust colors. "Enhance colors" can be now used on selections. New EXIF dialog button: Show in Google Earth. The EXIF dialog can stay displayed on screen. Several PlugIns are changed/updated.
Note: IrfanView is now bundled with Google Toolbar and Google Desktop Search. Installation of these components is optional.

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