Phototonic is an image viewer and organizer with the following features:
* Light weight with a smooth and clear user interface
* Does not depend on any desktop environment
* Supports several customized thumbnail layouts
* Load thumbnails and browse images recursively
* Dynamic thumbnails loading, enabling fast browsing of very large folders
* Filter thumbnails
* Image navigation and file management
* Slide show
* View random image
* Transformation: rotation, flipping, cropping, image mirroring
* Adjust image colors
* Keep transformations zoom and colors while browsing multiple images
* Extensive automatic and manual zoom options
* Supported image formats:
BMP, GIF, ICO, JPEG, MNG, PBM, PGM, PNG, PPM, SVG, SVGZ, TGA, TIFF, XBM, XPM
* Supports GIF animations
* Keyboard shortcuts and mouse behavior customization
* Load image files or folders from command line
* Open images with external applications