LispWorks

• A native-code compiler and an interpreter for an extended ANSI Common Lisp
• An implementation of the Common Lisp Object System with support for the metaobject protocol
• Support for 32-bit and 64-bit versions
• Native threads and symmetric multiprocessing
• Unicode support: it can read and write files, and supports strings, so encoded
• Foreign language interface to interface with routines written in C
• A Java interface
• The common application programming interface graphical user interface toolkit, which provides native look-and-feel on Windows, Cocoa, GTK+, and Motif
• An Emacs-like editor; source code is included in the Professional edition
• A Lisp Listener, which provides a Common Lisp read–eval–print loop
• A graphical debugger, inspector, stepper, profiler, class browser, etc.
• A facility to generate standalone executables and shared libraries; to reduce memory size, a tree shaker can be used to remove unused code and data
• On macOS, it provides a bridge to Objective-C for using Apple's Cocoa libraries
• Many of the libraries are written using the Common Lisp Object System and can be extended by the user, by writing subclasses and new methods

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