This GitHub Organization is dedicated to machine learning algorithms which operate on symbolic representations.
SymbolicML will eventually house PySR, SymbolicRegression.jl, and other related packages.
It currently hosts DynamicExpressions.jl, which is a framework for building symbolic regression algorithms (and is used by PySR and SymbolicRegression.jl), as well as DynamicQuantities.jl, which is a lightweight package for physical units that offers type stability.