colorizing multiple alignments

[john s jacobs anderson]

Greetings -

I have some multiple sequence alignments that I would like to colorize
on the basis of amino acid identity and similarity. Are there any
*nix, MacOS, or web-based tools that people would recommend for this?
(No Windows-only solutions, please.)

Thanks,
john.

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John S Jacobs Anderson                  Grad. Student, MCB Dep't
jacobs at penguin.biosci.arizona.edu    U. Arizona, Tucson, AZ, USA
Journeyman Molecular Biologist      -*-          Apprentice Geek