[pjmlp]

For example, the Interlisp-D of Xerox PARC, ZetaLisp of Genera or even Alegro Common Lisp.

They provide a rich graphical developer experience, with many features that are the genesis of modern IDEs, and nothing on their standard library and runtime depends on anything POSIX related.

The Lisps that "integrate well" with UNIX, like SBCL, do so by providing a UNIX text based repl without that graphical power, while using Emacs, an editor based on Lisp Machines, that even with SLIME is not quite like the commercial Lisps.

Same applies to any other language with a rich runtime, that makes the underlying OS irrelevant.