Graphics viewer, editor and converter. 
Free.
http://www.irfanview.com/

    * Many supported file formats (click here the list of formats)
    * Multi language support
    * Thumbnail/preview option
    * Paint option - to draw lines, circles, arrows, straighten image etc.
    * Toolbar skins option
    * Slideshow (save slideshow as EXE/SCR or burn it to CD)
    * Show EXIF/IPTC/Comment text in Slideshow/Fullscreen etc.
    * Support for Adobe Photoshop Filters
    * Fast directory view (moving through directory)
    * Batch conversion (with image processing)
    * Multipage TIF editing
    * File search
    * Email option
    * Multimedia player
    * Print option
    * Support for embedded color profiles in JPG/TIF
    * Change color depth
    * Scan (batch scan) support
    * Cut/crop
    * IPTC editing
    * Effects (Sharpen, Blur, Adobe 8BF, Filter Factory, Filters Unlimited, etc.)
    * Capturing
    * Extract icons from EXE/DLL/ICLs
    * Lossless JPG rotation
    * Many hotkeys
    * Many command line options
    * Many PlugIns
    * Only one EXE-File, no DLLs, no Shareware messages like "I Agree" or "Evaluation expired"
    * No registry changes without user action/permission!
    * and much much more


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