This helper allows you to pick the most ideal degenerate codons. It comes in two forms. You choose the required amino acids or you choose the codons to inspect.
This section would be cool if it had a negative option and stuff like, hydrophobics use Z.
It sorts with a 2x penalty for stop and give precence to more equal distributions, in case of a tie to less degenerate codons.
Accepts three letter code with first letter capital separated by a space, or one letter with spaces or not — corner case: SER is Ser + Asp + Arg while Ser is Serine.
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This site contains several tools with different citations.
Overview
Links to academic resources and academic social media presence of the authors