Luratech has plugins and an SDK for both their proprietary format and JPEG2000. Products come in a dizzying array of options, ActiveX controls, C-SDK, Java-SDK, plugins for PhotoShop or browsers. Note that some of their products can now be downloaded as freeward!

Note: What was once LuraTech is now Algo Vision LuraTech.

Reader Tom H. says: Luratech is the fastest licensable SDK out there right now

http://www.algovisionluratech.com/