These are some WSD systems available online (from reputable sources)

?generic?
http://www.dsi.uniroma1.it/~navigli/ look for link to Structural
Semantic Interconnections (SSI),


generic
http://search.cpan.org/dist/WordNet-SenseRelate-%20TargetWord/
corresponding ref
@inproceedings{1225772,
 author = {Patwardhan, Siddharth and Banerjee, Satanjeev and Pedersen, Ted},
 title = {SenseRelate::TargetWord: a generalized framework for word
sense disambiguation},
 booktitle = {ACL '05: Proceedings of the ACL 2005 on Interactive
poster and demonstration sessions},
 year = {2005},
 pages = {73--76},
 location = {Ann Arbor, Michigan},
 doi = {http://dx.doi.org/10.3115/1225753.1225772},
 publisher = {Association for Computational Linguistics},
 address = {Morristown, NJ, USA},
 }