This is a little assortment of places where I’ve found Lisp is in the world:

Note: Some of these might be stretches, but I want to show the general, influence that my favourite language has had on the world

• Autodesk uses AutoLisp as a scripting language for their products

• Their forums sometimes help me solve CL stuff as well

• SCI engine used for Sierra adventure games uses an object oriented Lisp
• Kandria a new indie game developed in CL
• Spycursion is a CL game in development by (defun games ())
• GCC creates many different trees during compilation, some of the later ones are outputted in Lisp list syntax
• Guix is a package manager written in Scheme, capable of running a distro (it leans on the Nix daemon to run the builds, which is sadly C++)
• Shepherd is an Init system written in Guile Scheme
• GNU utilities either do now or plan to ship with extensibility through Guile Scheme (writing inline Lisp in makefiles for example)

This article[a] on Grammarly states that

[a]

• Grammarly uses Common Lisp in production
• Hipmunk uses Lisp
• The London underground somehow uses Lisp

Another article[a] confirms the above and adds more

[a]

• Boeing 747 and 777 for both internal software and
• Boeing and Airbus apparently use Piano

• which is a CL program for aircraft design

• Circle CI
• Hacker News is written in Arc

• Franz Inc. uses CL heavily for data analysis

• The original Zork was written in a very simple Lisp

• Reddit 1.0 was written in Common Lisp[a]

[a]

• If you can setup the database should be perfectly runnable today

• pgloader got a rewrite in Common Lisp[a] around 2014 for performance reasons

[a]

• Quil[a] is a language (and associated Quantum Virtual Machine) written in Common Lisp

[a]

• Mezzano[a] is a working operating system written in pure CL

[a]

• Even boots on my hardware and runs absolutely smooth