Ada,
Smalltalk, Forth, Fortran, Pascal, Lua, Lisp, BCPL, Prolog,
Comal, C++, HeliOS,
Intercal, J, Java, Visual Pascal, Brainfuck,
Logo, Malbolge, Cobol, Perl, Pilot, Scheme, Python, Perl, SML, Y
and many variations of same. And those are just the free ones.
HeliOS was just an operating system, not a language, no? And wasn't
it what was used with the Transputer add-in? i.e., one couldn't run
HeliOS on an ungarnished Amiga.
Cheers,
Chuck