Fulgur is a GUI application for MATLAB for handling spectroscopic datasets and chemometric PLS models. It is constructed around the proprietary PLS_toolbox, but is otherwise released as open source. The source code was to be published on the Spectroscopy and chemometrics sections homepage: models.life.ku.dk, but a server migration has interfered with the publication of the source code, which should be concurrent with the announcement of the application in NIR News. The article is available: http://dx.doi.org/10.1255/nirn.1567
The source code can be downloaded as a zip-file from the link below.
I recommend using a subversion system such as TortoiseSVN or similar.
Esben Jannik Bjerrum