A long time ago, I was involved a little with the JPEG-LS standard and technology. Because the source of the UBC implementation is no longer accessible, I've tried to reconstruct the original page using the WayBack Machine and my own source archives.

Aleks Jakulin May, 2005 (updated Feb 2009).

CharLS by Jan de Vaan is written in portable C++ (new, Feb 2009)

Mirror of the UBC implementation

The "official" Hewlett-Packard Laboratories page

D. A. Clunie's implementation


Note that JPEG-LS is not compatible with the old lossless JPEG.