On Cliki.net <http://www.cliki.net/Common%20Lisp%20Utilities>, there is a collection of Common Lisp Utilities, things that everybody writes since they're not part of the official standard. There are some very useful things there; the only problems are that they aren't implemented as well as you'd like (some aren't implemented at all) and they aren't conveniently packaged and maintained. It takes quite a bit of work to carefully implement utilities for common use, commented and documented, with error checking placed everywhere some dumb user might make a mistake.

This package provides a Common Lisp system with a collection of common tests and operations to help handling pathnames. It does not actually deal in handling the accessing of files on the underlying system however.

Quickproject provides a quick way to make a Common Lisp project. After creating a project, it extends the ASDF registry so the project may be immediately loaded.

Skippy is a Common Lisp library to read and write GIF image files.

This package provides a Language Server Protocol implementation for use with the Alive Visual Studio Code extension.

It can be used in Emacs like this:

(require 'lsp)
(defun lsp-lisp-alive-start-ls ()
 "Start the alive-lsp."
 (interactive)
 (when-let (((lsp--port-available "localhost" lsp-lisp-alive-port)))
  (lsp-async-start-process #'ignore #'ignore
   "sbcl"
   "--eval"
   "(require :asdf)"
   "--eval"
   "(asdf:load-system :alive-lsp)"
   "--eval"
   (format "(alive/server::start :port %s)"
    lsp-lisp-alive-port))))

Roswell started out as a command-line tool with the aim to make installing and managing Common Lisp implementations really simple and easy. Roswell has now evolved into a full-stack environment for Common Lisp development, and has many features that makes it easy to test, share, and distribute your Lisp applications.

Roswell is still in beta. Despite this, the basic interfaces are stable and not likely to change.

Easy ISLISP (eisl) is an implementation of ISLisp which includes a compiler as well as an interpreter.

Buildapp is an application for SBCL or CCL that configures and saves an executable Common Lisp image. It is similar to cl-launch and hu.dwim.build.

TXR is a general-purpose, multi-paradigm programming language. It comprises two languages integrated into a single tool: a text scanning and extraction language referred to as the TXR Pattern Language (sometimes just "TXR"), and a general-purpose dialect of Lisp called TXR Lisp. TXR can be used for everything from "one liner" data transformation tasks at the command line, to data scanning and extracting scripts, to full application development in a wide-range of areas.

carp is a Lisp-like programming language that compiles to C. It features inferred static typing, macros, automatic memory management without a garbage collector, a REPL, and straightforward integration with code written in C.

ECL is an implementation of the Common Lisp language as defined by the ANSI X3J13 specification. Its most relevant features are: a bytecode compiler and interpreter, being able to compile Common Lisp with any C/C++ compiler, being able to build standalone executables and libraries, and supporting ASDF, Sockets, Gray streams, MOP, and other useful components.

Clozure CL (often called CCL for short) is a Common Lisp implementation featuring fast compilation speed, native threads, a precise, generational, compacting garbage collector, and a convenient foreign-function interface.

s7 is a Scheme interpreter intended as an extension language for other applications. It exists as just two files, s7.c and s7.h, that may be copied into the source tree of another application. There are no libraries, no run-time init files, and no configuration scripts. It can also be built as a stand-alone REPL interpreter.

jpm is the Janet Project Manager tool. It is a build tool and its main uses are installing dependencies, compiling C/C++ to native libraries, and other management tasks for Janet projects.

Lush is an object-oriented Lisp interpreter/compiler with features designed to please people who want to prototype large numerical applications. Lush includes an extensive library of vector/matrix/tensor manipulation, numerous numerical libraries (including GSL, LAPACK, and BLAS), a set of graphic functions, a simple GUI toolkit, and interfaces to various graphic and multimedia libraries such as OpenGL, SDL, Video4Linux, and ALSA (video/audio grabbing), and others. Lush is an ideal frontend script language for programming projects written in C or other languages. Lush also has libraries for Machine Learning, Neural Nets and statistical estimation.

This tool generates Lisp images that can embed the provided systems and make for REPLs that start blazing fast.

• It’s portable and should work with any compiler.

• It works for any REPL.

• It allows you to include arbitrary libraries.

s7 is a Scheme interpreter intended as an extension language for other applications. It exists as just two files, s7.c and s7.h, that may be copied into the source tree of another application. There are no libraries, no run-time init files, and no configuration scripts. It can also be built as a stand-alone REPL interpreter.

ASDF is what Common Lisp hackers use to build and load software. It is the successor of the Lisp DEFSYSTEM of yore. ASDF stands for Another System Definition Facility.

MDL (the MIT Design Language) is a descendant of Lisp. It was originally developed in 1971 on the PDP-10 computer under the Incompatible Timesharing System (ITS) to provide high level language support for the Dynamic Modeling Group at MIT's Project MAC. Infocom built the original PDP-10 Zork in MDL and their later ZIL (Zork Implementation Language) was based on a subset of MDL. Confusion is a MDL interpreter that works just well enough to play the original mainframe Zork all the way through.

Janet is a functional and imperative programming language. It can be used for rapid prototyping, dynamic systems, and other domains where dynamic languages shine. You can also add Janet scripting to an application by embedding a single C file and two headers. It can be easily ported to new platforms. The entire language (core library, interpreter, compiler, assembler, PEG) is less than 1MB.

Steel Bank Common Lisp (SBCL) is a high performance Common Lisp compiler. In addition to the compiler and runtime system for ANSI Common Lisp, it provides an interactive environment including a debugger, a statistical profiler, a code coverage tool, and many other extensions.

GCL is an implementation of the Common Lisp language. It features the ability to compile to native object code and to load native object code modules directly into its lisp core. It also features a stratified garbage collection strategy, a source-level debugger and a built-in interface to the Tk widget system.

GNU CLISP is an implementation of ANSI Common Lisp. Common Lisp is a high-level, object-oriented functional programming language. CLISP includes an interpreter, a compiler, a debugger, and much more.

Clasp is a new Common Lisp implementation that seamlessly interoperates with C++ libraries and programs using LLVM for compilation to native code. This allows Clasp to take advantage of a vast array of preexisting libraries and programs, such as out of the scientific computing ecosystem. Embedding them in a Common Lisp environment allows you to make use of rapid prototyping, incremental development, and other capabilities that make it a powerful language.