Suggest an alternative to

Eff

Eff monad for cats - https://atnos-org.github.io/eff

Why do you think that https://github.com/softwaremill/quicklens is a good alternative to Eff

A URL to the alternative repo (e.g. GitHub, GitLab)

Here you can share your experience with the project you are suggesting or its comparison with Eff. Optional.

A valid email to send you a verification link when necessary or log in.