If by digital objects you mean images we've been getting a lot of mileage out of OpenSeaDragon [1] at the Library of Congress. You do have to pre-generate the deep-zoom-files DZI [2] or you can implement your own server side tiling code to do it on the fly. As a space vs time trade off we generate tiles on the fly in Chronicling America [3], since there are millions of newspaper page images. But in the World Digital Library [4] we generate DZI files. Chris Thatcher, one of the developers at LC has a fork of the codeplex repo on GitHub [5], which we are applying some fixes to, since GitHub is alot easier to navigate and use than Codeplex. If you are curious here are some samples of the viewer in action: http://chroniclingamerica.loc.gov/lccn/sn85066387/1912-01-31/ed-1/seq-1/ http://www.wdl.org/en/item/4106/zoom/#group=1&page=4 //Ed [1] http://openseadragon.codeplex.com/ [2] https://github.com/openzoom/deepzoom.py [3] http://chroniclingamerica.loc.gov [4] http://wdl.org [5] https://github.com/thatcher/openseadragon