The CUTG database contains a series of codon usage tables calculated from GenBank.
CUTG can be obtained via anonymous FTP.3.15
CUTG is integrated with EMBOSS using the program cutgextract which writes files to the CODONS data directory.
% cutgextract Extract data from CUTG CUTG directory [.]: /data/cutg/
The CUTG database is now integrated with EMBOSS.