CAIcal is a web server that performs several computations in relation to
codon usage and the codon adaptation of DNA or RNA sequences to host
organisms.
This web server is freely accessible at http://genomes.urv.cat/CAIcal
For more details see the article Puigbo P, Bravo IG and Garcia-Vallve S.
(2008) CAIcal: a combined set of tools to assess codon usage adaptation.
Biology Direct, 3:38.