redF is an interpreter of lisp-like redf language.
Read the FAQ.
redF is not yet available in any distributions. Try adding the "redF" package for yours. If it's available, you're either insane or lucky.
If you're interested in packaging redF for your distribution for real, you'll be appreciated and honored.
$ git clone https://github.com/CompilerBootCamp/ProjectF
$ cd ProjectF
$ make