LIPS has documentation builtin into every function. You can see the docstring when you hover over the name of the symbol in the REPL. It also has auto-indent. Also if you press enter you can get back and modify previous lines of code. History doesn't repeat lines only full S-Expressions so it's easy to rerun a big chunk of code.
Even though Try Gambit is a REPL it's not very user-friendly.
Even though Try Gambit is a REPL it's not very user-friendly.