FastStone Image Viewer: freeware
FastStone Image Viewer has similar usage and interface as ACDsee, but much little size , quick and powerful. The most important thing is that it’s a freeware. But, if you want to donate, please look at author’s website. I’m tired with ACDsee and other image viewers, whose funtion increases with software package size. I only need the primary or original function, browse the photoes in my laptop, other features is out of my consideration. FastStone Image Viewer is what I want. Wish you’ll like it .
No Adware No Spyware Free for Home Users

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).