GNU CLISP is an ANSI Common Lisp implementation
with an interpreter, compiler, debugger, object
system (CLOS, MOP), sockets, fast bignums, arbitrary precision floats, and a foreign language interface that runs on most Unix variants and Win32.
Jabberwocky is a Lisp IDE containing a Lisp-aware editor with syntax highlighting, parentheses matching, a source analyzer, indentation, a source level debugger, a project explorer, and an interaction buffer. It is the replacement for the Lisp Debug project.