• Modernizing Common Lisp: Recommended Extensions (1999) http://lists.tunes.org/archives/tunes/2001-February/003058.html 4 comments 10/3/2011
• Web-Browser inspired by Emacs, extensible with Common Lisp https://github.com/atlas-engineer/next 2 comments 20/11/2018
• Kina Knowledge, using Common Lisp extensively in their document processing stack https://lisp-journey.gitlab.io/blog/lisp-interview-kina/ 60 comments 22/10/2021

• common-lisp-extensions: list of extensions beyond ANSI standard, and the status of its spread across implementations. https://github.com/guicho271828/common-lisp-extensions 12 comments 19/5/2019 lisp
• Modernizing Common Lisp: Recommended Extensions (from 1999) http://lists.tunes.org/archives/tunes/2001-february/003058.html 7 comments 10/3/2011 lisp
• Common Lisp language extensions wish list? None 2 comments 12/10/2022 common_lisp
• A portable and extensible Common Lisp Reader that can recover from most errors https://github.com/s-expressionists/Eclector 2 comments 14/12/2020 common_lisp
• CLOS – the Common Lisp Cookbook (extensive rewrite) https://lispcookbook.github.io/cl-cookbook/clos.html 9 comments 3/10/2018 lisp
• Getting Started in *Lisp (Star Lisp), a data parallel extension of Common Lisp http://people.csail.mit.edu/bradley/cm5docs/nov06/gettingstartedinstarlisp.pdf 11 comments 10/1/2020 lisp
• Redshank: Common Lisp Editing Extensions for Emacs http://www.foldr.org/~michaelw/emacs/redshank/ 4 comments 22/3/2008 programming
• Survey of Syntactic Extension in the Lisp Family, Part 2 (Emacs, Common, Clojure and a tiny bit of Arc, defmacro style macros). http://dorophone.blogspot.com/2011/08/survey-of-syntactic-extension.html 22 comments 11/8/2011 scheme
• Survey of Syntactic Extension in the Lisp Family, Part 2 (Emacs, Common, Clojure and a tiny bit of Arc, defmacro style macros). http://dorophone.blogspot.com/2011/08/survey-of-syntactic-extension.html 5 comments 11/8/2011 lisp
• Lisp Interview: questions to Alex Nygren of Kina Knowledge, using Common Lisp extensively in their document processing stack https://lisp-journey.gitlab.io/blog/lisp-interview-kina/ 8 comments 22/10/2021 lisp
• "Did you know there is a Python implementation written in Common Lisp? It works and could be a good candidate for an extension language." https://fosstodon.org/@svetlyak40wt/111346758561228402 9 comments 4/11/2023 common_lisp

• Nyxt: an extensible EMACS-like web browser written in Common Lisp https://github.com/atlas-engineer/nyxt 2 comments 12/11/2020 lisp , web-browsers

• AP5: A declaritive language extension to Common Lisp http://ap5.com/ 2 comments 26/5/2002 Logic/Declerative