It's a Windows program that is mainly a image browser/gallery viewer but has a lot of great features.
It's a great COMPLETELY FREE substitute to ACDSee and has some features that set it above many commercial offerings. You can get it from here:
http://www.faststone.org/FSViewerDetail.htm
Quoting from the site:
"FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor. It has a nice array of features that include image viewing, management, comparison, red-eye removal, emailing, resizing, cropping and color adjustments. Its innovative but intuitive full-screen mode provides quick access to EXIF information, thumbnail browser and major functionalities via hidden toolbars that pop up when your mouse touches the four edges of the screen. Other features include a high quality magnifier and a musical slideshow with 150+ transitional effects, as well as lossless JPEG transitions, drop shadow effects, image annotation, scanner support, histogram and much more. It supports all major graphic formats (BMP, JPEG, JPEG 2000, animated GIF, PNG, PCX, TIFF, WMF, ICO and TGA) and popular digital camera RAW formats (CRW, CR2, NEF, PEF, RAF, MRW, ORF, SRF and DNG)."
It also has some other cool features: exports groups of images as pdf files, batch rename of files, batch convert to other file types, compares images to find duplicates, has a very nice crop and draw board that i use to make the preview images that I upload to this site.
