• Land of Lisp - A fun, game-oriented introduction to Common Lisp.
• ANSI Common Lisp - A thorough, practical covering of the entire language, with exercises. Not recommended as a starter text, due to [some caveats][20].
• Common Lisp Recipes - **Common Lisp Recipes** is a collection of solutions to problems and answers to questions you are likely to encounter when writing real-world applications in Common Lisp. Published in 2015.
• Building Problem Solvers - Searchable.pdf)) by Ken Forbus and Johan de Kleer, made available for free by MIT Press - a unique book among standard artificial intelligence texts in combining science and engineering, theory and craft to describe the construction of AI reasoning systems, and including code illustrating the ideas.
• /r/Common_Lisp - subreddit about Common Lisp
• /r/learnlisp - a subreddit to ask questions and get help about Lisp
• common-lisp.net
• lisp-lang.org
• Lisp Discord Server
• #commonlisp - main Common Lisp IRC channel.
• #lisp - IRC channel for all Lisp dialects.
• Planet Lisp - A meta blog that collects the contents of various Lisp-related blogs.
• Common Lisp chat - Keybase team with well-defined rules and retention policies.
• Quicklisp bundles - self-contained sets of systems that are exported from Quicklisp and loadable without involving Quicklisp.
• CLPM - A package manager for Common Lisp that strives to cleanly separate the package manager process itself from the client image that uses it. [BSD_2Clause][17].
• Ultralisp - A Quicklisp distribution which updates every 5 minutes and to which one can add his project in one click. [BSD][15].
• Quicksys - install systems from multiple Quicklisp distributions. [MIT][200].
• ANSI Common Lisp - A thorough, practical covering of the entire language, with exercises. Not recommended as a starter text, due to [some caveats][20].
• common-lisp.net
• Lisp Discord Server
• CLPM - A package manager for Common Lisp that strives to cleanly separate the package manager process itself from the client image that uses it. [BSD_2Clause][17].
• Ultralisp - A Quicklisp distribution which updates every 5 minutes and to which one can add his project in one click. [BSD][15].
• Ultralisp - A Quicklisp distribution which updates every 5 minutes and to which one can add his project in one click. [BSD][15].

Interfaces to other package managers

• this Youtube video - works-delivery and linux-packaging.
• author
• AI Challenge
• antik - a foundation for scientific and engineering computation in Common Lisp. GPL. Also [mgl-mat](https://github.com/melisgl/mgl-mat) and [LLA](https://github.com/tpapp/lla).
• State of CL Ecosystem 2015
• Cliki
• cl-brewer - Homebrew formula builder for (command line) common lisp applications. Public domain.
• antik - a foundation for scientific and engineering computation in Common Lisp. GPL. Also [mgl-mat](https://github.com/melisgl/mgl-mat) and [LLA](https://github.com/tpapp/lla).
• State of CL Ecosystem 2015
• babel2 - A Fluid Construction Grammar implementation, computational framework, and unification-based grammar formalism [Apache2.0][89].
• Cliki
• Hunchentoot - A web server. [2-clause BSD][207]

Clack plugins

• Quickdocs

Isomorphic web frameworks

• Interactive SSR - ISSR allows you to make interactive web pages without writing client scripting. No knowledge about Javascript or DOM is necessary.
• Parenscript - A translator from Common Lisp to Javascript. [3-clause BSD][15]. See [Trident-mode](https://github.com/johnmastro/trident-mode.el), an Emacs mode that provides live interaction with the browser.[unlicence][5].
• CL-JavaScript - A translator from Javascript to Common Lisp. Not available on Quicklisp. [Expat][14].
• parse-js - A package for parsing ECMAScript 3. [zlib][33].
• JACL - an experimental Lisp system for the Web browser platform to explore new techniques for developing large Single Page Applications with Lisp.
• Platform.sh - paas/languages-lisp/) through their Web PaaS partnership.
• Heliohost
• Cloud Init file for SBCL - an init file for providers supporting the cloudinit format (DigitalOcean etc).
• Interactive SSR - ISSR allows you to make interactive web pages without writing client scripting. No knowledge about Javascript or DOM is necessary.
• cl-who - The venerable HTML generator. [FreeBSD][39].
• clip - An HTML template processor where the templates are written in HTML. [zlib][33].
• Parenscript - A translator from Common Lisp to Javascript. [3-clause BSD][15]. See [Trident-mode](https://github.com/johnmastro/trident-mode.el), an Emacs mode that provides live interaction with the browser.[unlicence][5].
• CL-JavaScript - A translator from Javascript to Common Lisp. Not available on Quicklisp. [Expat][14].
• parse-js - A package for parsing ECMAScript 3. [zlib][33].
• Panic - lisp-example/examples/common-lisp-react/src/app.lisp).
• deploy - A toolkit for binary deployment of Lisp applications, with extra support for foreign shared libraries. [zlib][33].
• Platform.sh - paas/languages-lisp/) through their Web PaaS partnership.
• Heliohost
• scrapycl - web scraping framework for writing crawlers in Common Lisp. Unlicense.

Web project skeletons and generators

• cl-wget - Makes retrieving large files or mirroring entire websites easy. [AGPL-3.0][51].

Email

• cl-smtp - CL-SMTP is a simple lisp smtp client.

Third-party APIs

• cl-irc - An IRC client library. [Expat][14].
• stripe - a client for the Stripe payment system. [MIT][200].
• cl-telegram-bot - Telegram bot API. [MIT][200].
• maxima - Computer Algebra System. [GNU GPL3][2].
• Maxima on Android
• SageMath - mode](https://gitlab.com/sasanidas/maxima) ([screenshot](https://community.linuxmint.com/img/screenshots/maxima-emacs.png)) and [maxima-interface](https://github.com/jmbr/maxima-interface) to ease the interface between Maxima and Common Lisp.
• from a Lisp REPL
• GSLL - GNU Scientific Library for Lisp; allows the use of the GSL from Common Lisp. [GNU LGPL2.1][11].
• lisp-stat - an environment for statistical computing, conceptually similar to R, that is also suitable for front-line production deployments. "It grew out of a desire to have an environment for rapidly prototyping analytical and A.I. solutions, and move directly to production environments with minimal friction."
• XLisp-Stat
• BordeauxThreads - Portable, shared-state concurrency. [Expat][14].
• Emotiq blockchain
• SBCL's timers - wide event schedulers.
• lserver
• Linedit - Readline-style
• CL Cookbook: running external programs
• Consfigurator - Lisp declarative configuration management system. You can use it to configure hosts as root, deploy services as unprivileged users, build and deploy containers, and produce disc images. [GPL3][2].
• paper
• north - The successor to the South (Simple OaUTH) library, implementing the full oAuth 1.0a protocol, both client and server sides. Using North you can easily become an oAuth provider or consumer. [zlib][33].
• cl-irc - An IRC client library. [Expat][14].
• maxima - Computer Algebra System. [GNU GPL3][2].
• GSLL - GNU Scientific Library for Lisp; allows the use of the GSL from Common Lisp. [GNU LGPL2.1][11].
• 3d-matrices - A library implementing common matrix calculations, with an emphasis on 2x2,3x3, and 4x4 matrices as commonly used in graphics. It provides some numerical functions as well, but those are not the focus. The library is heavily optimised, so it is not made of pretty code. [zlib][33].
• cmu-infix - A library for writing infix mathematical notation in Common Lisp. See also [polisher](https://github.com/mrcdr/polisher).
• BordeauxThreads - Portable, shared-state concurrency. [Expat][14].
• Moira - Monitor and restart background threads. In-lisp process supervisor. [MIT][200].
• cl-ppcre - Portable, Perl-compatible regular expressions. [FreeBSD][39].
• one-more-re-nightmare - a fast-ish regular expression compiler in Common Lisp. [BSD_2Clause][17].
• Linedit - Readline-style
• shcl - a POSIX-like shell in Common Lisp. [Apache2.0][89].
• paper

Static site generators

• coleslaw

Third-party APIs

• cl-git - a CFFI interface to the libgit2 library. [LGPL3][9].
• CodePlayground - an iPhone and iPad app with Lisp support via CCL.
• trivial-sanitize - clean html strings: `"<a>foo</a>"` → `"foo"`. [LLGPL][8].
• CLUnit2 - A unit testing library. [MIT][200].
• SBCL's code coverage tool
• testieren - a testing utility where tests are included at the top of a `defun/t` form. They are run when you recompile your functions interactively. With mocking and stubbing support. [GPL3][2].
• Sabra Crolleton's extensive test frameworks comparison
• Salza2 - A library for creating compressed data. [FreeBSD][39].
• cl-tar - project-cl-tar.html).
• py-configparser - reads and writes Python's ConfigParser-like configuration files. [MIT][200].
• local-time - A development library for manipulating date and time information in a semi-standard manner. [3-clause BSD][15].
• Calendrical calculations
• GTFL - A graphical terminal for Lisp, meant for Lisp programmers who want to debug or visualize their own algorithms. A graphical trace in the browser. BSD-style.
• sphinxcontrib-cldomain
• uiop
• osicat - A lightweight operating system interface on POSIX-like systems (directory iteration and deletion, environment variables, file permissions, etc) [Expat][14].
• cl-i18n - an i18n library. Load translations from GNU gettext text or binary files or from its native format. Localisation helpers of plural forms. [LLGPL][8].
• extensive comparison of logging libraries
• cl-pslib - a (thin) wrapper around the [pslib](http://pslib.sourceforge.net/) library for generating PostScript files. Also [cl-pslib-barcode](https://notabug.org/cage/cl-pslib-barcode). [LLGPL][8].
• ADW-Charting - A simple chart drawing library written completely in Common Lisp. Also includes a backend to Google's chart service. BSD-like.
• CXML - XML parser and serializer, with a range of extension libraries. [LLGPL][8].
• s-xml - A basic parser. [LLGPL][8].
• trivial-utf8 - A small library for doing UTF-8-based I/O. BSD.
• FiveAM - Simple regression testing framework. [FreeBSD][39].
• Salza2 - A library for creating compressed data. [FreeBSD][39].
• cl-tar - project-cl-tar.html).
• py-configparser - reads and writes Python's ConfigParser-like configuration files. [MIT][200].
• local-time - A development library for manipulating date and time information in a semi-standard manner. [3-clause BSD][15].
• Calendrical calculations
• cl-debug - a cross-package debug facility. Provides a unified way to enable or disable debug-specific code. Debugging code can be enabled or disabled relative to program features denoted by either a symbol or a keyword. ISC licence.
• uiop
• cl-fad
• osicat - A lightweight operating system interface on POSIX-like systems (directory iteration and deletion, environment variables, file permissions, etc) [Expat][14].
• language-codes - A database library for ISO language codes. [zlib][33]
• system-locale - A library to retrieve the user's preferred language, so that your application may choose a sensible default. [zlib][33].
• multilang-documentation - Allows writing docstrings in multiple languages, for truly internationally documented libraries. [zlib][33].
• sblint - a linter for Common Lisp source code using SBCL, suited for Reviewdog ([slides](http://www.slideshare.net/fukamachi/sblint)). [BSD_2Clause][17].
• verbose - A fast and highly configurable logging framework. [zlib][33].
• cl-fluent-logger - A Common Lisp structured logger for [Fluentd](https://www.fluentd.org/).
• ADW-Charting - A simple chart drawing library written completely in Common Lisp. Also includes a backend to Google's chart service. BSD-like.
• CXML - XML parser and serializer, with a range of extension libraries. [LLGPL][8].
• s-xml - A basic parser. [LLGPL][8].
• cl-feedparser - A Common Lisp (RSS, Atom) feed parser. [LLGPL][8]
• trivial-utf8 - A small library for doing UTF-8-based I/O. BSD.
• CLUnit2 - A unit testing library. [MIT][200].
• xlsx - a basic reader for Excel files.
• Lisp REPL core dumper

Third-party APIs

• cl-devel2 - a Docker container for Common Lisp development environment. Ships SBCL, CCL, Roswell and Emacs25 with Slime.
• sly-overlay - an extension for Sly that enables the overlay of Common Lisp evaluation results directly into the buffer in the spirit of CIDER (Clojure), Eros (Emacs Lisp) and the Lem editor.

Third-party APIs

• Lem 2.0
• opengl frontend - docker), [lem-pareto](https://github.com/40ants/lem-pareto).
• Lem on the cloud

Third-party APIs

• Sublime Text

Third-party APIs

• commonlisp-vscode - an extension to support syntax highlight, auto completion, documentation on hover, go to definition, compile & load file, REPL. It is [On GitHub](https://github.com/ailisp/commonlisp-vscode/).
• using VSCode with Alive
• strict-paredit-vscode - structural editing and navigation like Emacs.

Third-party APIs

• Judge0 IDE
• Riju

Third-party APIs

• this active fork - line input and binary releases. Simply download a binary (for Ubuntu) and run it.

Uncategorized

• roadmap
• the introductory blog post
• FSet vs. Sycamore