I think you're not looking for an image viewing program (that would be something you browse pictures on your own computer with... e.g. Microsoft Image Viewer) What you want is a web image gallery script(s.) One popular one is simply called "Gallery" and is used by several xepher.net members.
http://gallery.menalto.com/ It let's you directly upload images, and automatically creates thumbnails for them, as well as let's people comment and other things. Other people tend to write their own pages, such as the page you linked. It's just a standard table setup to use
lightbox to overlay the full image when you click. You'd need to have a decent grasp of web coding to use the latter option though... at least basic knowledge of CSS.
As to your unasked question... applications should be opening again real soon. I'm waiting on the DNS issue to be fixed, and I last got an ETA of sometime today for that... so hopefully with the start of the business day tomorrow that'll be resolved. I'll likely open up applications later this week if that's the case.