* a sophisticated native-code compiler which is capable of powerful type inferences, and generates code competitive in speed with C compilers.
* generational garbage collection and multiprocessing capability on the x86 ports.
* a foreign function interface which allows interfacing with C code and system libraries, including shared libraries on most platforms, and direct access to Unix system calls.
* support for interprocess communication and remote procedure calls.
* an implementation of CLOS, the Common Lisp Object System, which includes multimethods and a metaobject protocol.
* a graphical source-level debugger using a Motif interface, and a code profiler.
* an interface to the X11 Window System (CLX), and a sophisticated graphical widget library (Garnet).
* programmer-extensible input and output streams.
* an Emacs-like editor implemented in Common Lisp.
* freely redistributable: free, with full source code (most of which is in the public domain) and no strings attached (and no warranty). Like the GNU/Linux? and *BSD operating systems, CMUCL is maintained and improved by a team of volunteers collaborating over the Internet."
Homepage: http://www.cons.org/cmucl/index.html
License: Open source
Platforms: Unix, Linux, *BSD