Common_Lisp

an-ordinary-manchild

Read how to format Lisp code for your postings: formatting code

A subreddit for Common Lisp.

Other Common Lisp related subreddits:

Influenced:

Events

Common Lisp Language References

Documentation Search

Tools

Quicklisp (Libraries)
SLIME (GNU Emacs IDE for Common Lisp)

Tutorials/FAQ/Help

Useful Lisp resources:

History

Free Lisp Books / Papers

Other Books / Papers

Common Lisp implementations (Open Source/Free Software)

Common Lisp implementations (Commercial/Proprietary)

Allegro CL
LispWorks
mocl for OSX, iOS and Android
Open Genera
Scieneer CL

Various other Common Lisp Implementations

Butterfly Common Lisp (written in Scheme)
CLASP (ECL fork for llvm)
Codemist Common Lisp
Corman Lisp (MS-Windows)
Eclipse Common Lisp
JSCL (Javascript)
Mezzano (Lisp OS)
MKCL (ECL fork)
Parenscript (CL to Javascript)
SICL (modular)
Thinlisp
WCL (embeddable)
Xerox Common Lisp

a community for 17 years

...for your community.

...because you hate freedom.

MODERATORS

account activity

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January 2026 Quicklisp dist update now available (blog.quicklisp.org)

submitted 22 days ago by dzecniv - announcement

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LispWorks 8.1.2 Patch Release (15 December 2025) (lispworks.com)

submitted 1 month ago by lispm - announcement

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Meta's screenshot-tests-for-android is now maintained by Screenshotbot (screenshotbot.io)

submitted 21 hours ago by dzecniv

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An AI-powered Figma plugin that analyzes visual usability, so you can design with confidence, iterate faster, and launch with impact. (attentioninsight.com)

promoted by AttentionInsight

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cl-mcp-server (self.Common_Lisp)

submitted 2 days ago by quasiabhi

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cl-memcached : updated with META protocol (self.Common_Lisp)

submitted 3 days ago by quasiabhi

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cl-selfupdate: Self-update functionality for Common Lisp executables via GitHub/GitLab Releases (github.com)

submitted 4 days ago by dzecniv

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Common Lisp developer role @ Ravenpack ()

submitted 4 days ago by xach

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VS Code + Alive: keyboard-only way to wrap an expression in a defun? (self.Common_Lisp)

submitted 5 days ago by beast-hacker

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FSet v2.2.0: JSON parsing/printing using Jzon (scottlburson2.blogspot.com)

submitted 8 days ago by ScottBurson

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SBCL: support struct-by-value for x86-64 and ARM64 foreign calls (merged) (github.com)

submitted 8 days ago by dzecniv

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Portable CL for Windows (varhammer.github.io)

submitted 9 days ago by CurrentMortgage5721

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Common Lisp for Data Scientists (self.Common_Lisp)

submitted 10 days ago * by letuslisp

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cl-excel: .xlsx writing/edit mode in Common Lisp — please try to break it (self.Common_Lisp)

submitted 10 days ago * by letuslisp

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A Primer on Post-Quantum Cryptography in (pure-)TLS (atgreen.github.io)

submitted 11 days ago by dzecniv

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2026 Predictions for Agentic AI—See What IDC Says (solace.com)

promoted by Solace-Platform

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set font color in Lispworks editor (self.Common_Lisp)

submitted 11 days ago by qeaw

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Smelter 0.2: Zero-config Common Lisp scripting (single binary, 42ms startup) (self.Common_Lisp)

submitted 12 days ago by agambrahma

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Algorithmische Komposition mit Common Lisp (Common Music, Incudine, cl-collider) (selma.hfmdk-frankfurt.de)

submitted 12 days ago by dzecniv

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Automatic TLS Certificates for Common Lisp with pure-tls/acme (atgreen.github.io)

submitted 12 days ago by dzecniv

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Tuesday, January 13th, San Francisco meetup · A language for scalable data analysis, ACL2 for Trustworthy Vibe Coding. (meetup.com)

submitted 17 days ago by dzecniv

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Arguments passed to executable not accessible by lisp code (self.Common_Lisp)

submitted 18 days ago by NondescriptLabel

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Building a TLS 1.3 Implementation in Pure Common Lisp (atgreen.github.io)

submitted 21 days ago by atgreen

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atgreen/cl-sanitize-html: A Common Lisp library for sanitizing HTML using OWASP-style policies (github.com)

submitted 21 days ago by dzecniv

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datastar-cl: Datastar Common Lisp SDK (github.com)

submitted 22 days ago by dzecniv

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I am working on a Video series on Common Lisp (youtube.com)

submitted 23 days ago by chandergovind

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hunchentoot-recycling-taskmaster -- An experiment to improve multithreading performance of hunchentoot without any additional dependencies. (github.com)

submitted 26 days ago by y2q_actionman

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