Steel Bank Common Lisp is a development environment for Common Lisp, with excellent support for the ANSI standard: garbage collection, lexical closures, powerful macros, strong dynamic typing, incremental compilation, and the famous Common Lisp Object System (multimethods and all). It also includes many extensions, such as native threads, socket support, a statistical profiler, programmable streams, and more. These are all available through an integrated, interactive native compiler which feels like an interpreter. SBCL is unique in being a multiplatform native compiler which bootstraps itself completely from source, using a C compiler and any other ANSI Common Lisp implementation.
CMUCL is a free, high performance implementation of the Common Lisp programming language which runs on most major Unix platforms. It mainly conforms to the ANSI Common Lisp standard. CMUCL provides a sophisticated native code compiler; a powerful foreign function interface; an implementation of CLOS; the Common Lisp Object System; which includes multimethods and a metaobject protocol; a source-level debugger and code profiler; and an Emacs-like editor implemented in Common Lisp. CMUCL is maintained by a team of volunteers collaborating over the Internet, and is mostly in the public domain.
fish, the friendly interactive shell is a shell that is focused on interactive use, discoverability, and user friendliness. The design goal of fish is to give the user a rich set of powerful features in a way that is easy to discover, remember, and use. fish features a user-friendly and powerful tab-completion, including descriptions of every completion, tab-completion of strings with wildcards, and many completions for specific commands. It also features an extensive and discoverable help system. A special help command gives access to all the fish documentation in your preferred Web browser. Other features include syntax highlighting with extensive error checking, support for the X clipboard, smart terminal handling based on terminfo, an easy to search, no duplicates history.
GNU ccScript offers a class extensible threaded embedded scripting engine for use with the Common C++ GNU package. This engine is also used in Bayonne (the GNU telephony server), and in TOSI (FreeBSD and GNU/Linux PBX integration servers). This engine differs from traditional scripting systems in that it is used to script near real-time state-event systems through deterministic callback step execution rather than the linear and non-deterministic fashion of embedded script libraries such as tcl, and libguile.
ActivePerl is the industry-standard Perl distribution, available for Windows, Linux, Mac OS X, Solaris, AIX, and HP-UX. Complete and ready-to-install, the ActivePerl distribution includes core Perl, popular modules, the Perl Package Manager (PPM), and complete documentation. The Windows version provides additional features that have made ActivePerl the worldwide standard for Perl on Windows.