Programme to calculate dN/dS between pair of sequences in a seq alignment

Question

[Chvatil]

Hello everyone, I'm writing this post because I wanted to know if any of you know of an efficient software that takes a sequence codon alignment as input, and calculates the dN/dS between each pair of sequence ?

The only constraint is that I'm looking for a maximum lihelihood and/or Bayesian method to infer this dN/dS and not a simple counting method.

Thank you and have a nice day