Not by default, but Julia has various units packages which integrate fairly well with the rest of the ecosystem. Unitful.jl [1] is the most used one I believe and integrates with DifferentialEquations.jl for example. It should also work with many other things, but you might have to patch it up a bit, especially if operations change the units (such as derivatives).

[1] https://github.com/PainterQubits/Unitful.jl

F# probably is best in class here: https://fsharpforfunandprofit.com/posts/units-of-measure/

The Wolfram Language (i.e., the language used for Mathematica) supports units by default through the Quantity object [0], but the software is somewhat expensive for general-purpose use.

[0] https://reference.wolfram.com/language/ref/Quantity.html

There is Frink [0] which was created for the manipulation of physical quantities. I used it extensively in college… imperial units for fluid dynamics? yuck!

[0] https://frinklang.org/

Yes, frink is one: https://futureboy.us/frinkdocs/

There is some argument for C++11 which has user-defined literals: https://en.cppreference.com/w/cpp/language/user_literal

Library for physical units using that feature would be awesome.

Built into standard library for time units: https://en.cppreference.com/w/cpp/symbol_index/chrono_litera...

F#