This plug-in offers all kinds of possibilities to display content through the standard jQuery extension Fancybox.
For example a single image (click on the image):
Or a set of images (click on 1 of the images; use arrows or mouse scroll):
A different set of images (with different dimensions) that is grouped together separately:
Display of hidden text in the same web page: Read the hidden part
A PDF: This is an example
A Flash file: Animation example
This post is also available in Nederlands.