FastStone Image Viewer is a Photo Viewer, Editor and Batch Converter with an easy to use interface and a nice array of features, that include resizing, renaming, cropping, color adjustments, watermarks and more. It also includes an intuitive full-screen mode that provides quick access to EXIF information and thumbnail browser via hidden toolbars that emerge when you touch the edge of your screen with the mouse.

FastStone Image Viewer Features
- Image modification tools: Resize/resample, rotate/flip, crop, sharpen/blur, brightness/contrast, etc.
- Image special effects: watermark, annotation, drop shadow, framing, bump map, lens, morph, waves
- Image browser and viewer with a familiar Windows Explorer-like user interface
- Support of many popular image formats
- True Full Screen viewer with image zoom support and unique fly-out menu panels
- Crystal-clear and customizable one-click image magnifier
- Superior Red-Eye effect removal/reduction with completely natural looking end result
- Eleven (yes, 11) resampling algorithms to choose from when resizing images
- Image color effects: gray scale, sepia, negative, Red/Green/Blue adjustment
- Multi-level Undo/Redo capability
- One-touch best fit/actual size image display support
- Image management, including tagging capability, with drag-and-drop and Copy To/Move To Folder support
- Histogram display with color counter feature
- Compare images side-by-side (up to 4 at a time) to easily cull those forgettable shots
- Image EXIF metadata support (plus comment editing for JPEGs)
- Configurable batch processing to convert/rename large or small collections of images
- Slideshow creation with 150+ transition effects and music support (MP3, WMA, WAV...)
- Create efficient image attachment(s) for emailing to family and friends
- Print images with full page-layout control
- Create fully configurable Contact Sheets - just like the pros (and save $$$ on ink)
- Create memorable artistic image montages from your family photos for personalized desktop wallpapers (Wallpaper Anywhere)
- Acquire images from a scanner
- Versatile screen capture capability
- Powerful Save As interface to compare image quality and control generated file size
- Run favorite programs with one keystroke from within Image Viewer
- Create a no-install fully portable version of the program which can be run from a removable storage device
- Configurable mouse wheel support
- Supports multiple program skins
- Supports dual-monitor configurations