ImageGlass - Free and open source image viewer

imageglass.zip (24,8 MB)
ImageGlass is a lightweight, versatile image viewing application.

iView.NET

iviewdotnet.zip (5,9 MB)
iView.NET is a light weight open source free to use and redistribute image viewer, manager and editor software application all rolled into one.

SharePoint ImageCache (SPImageCache)

spimagecache.zip (1,6 MB)
SPImageCache is a SharePoint 2010 image processing framework. It allows different image transformation based on its URL. This project was inspired by Drupal ImageCache module.