diff --git a/by-list.md b/by-list.md
index 6b86fc9..fd8ae72 100644
--- a/by-list.md
+++ b/by-list.md
@@ -328,6 +328,7 @@
 - [cheeaun/phanpy](https://github.com/cheeaun/phanpy) - A minimalistic opinionated Mastodon web client
 - [spatie/sheets](https://github.com/spatie/sheets) - Store & retrieve your static content in plain text files
 - [cocur/slugify](https://github.com/cocur/slugify) - Converts a string to a slug. Includes integrations for Symfony, Silex, Laravel, Zend Framework 2, Twig, Nette and Latte.
+- [morgan3d/markdeep](https://github.com/morgan3d/markdeep) - Official public Markdeep source archive
 
 ## knowledge
 - [TiddlyWiki/TiddlyWiki5](https://github.com/TiddlyWiki/TiddlyWiki5) - A self-contained JavaScript wiki for the browser, Node.js, AWS Lambda etc.
@@ -364,6 +365,7 @@
 - [Moham3dRiahi/Th3inspector](https://github.com/Moham3dRiahi/Th3inspector) - Th3Inspector 🕵️ Best Tool For Information Gathering 🔎
 - [public-apis/public-apis](https://github.com/public-apis/public-apis) - A collective list of free APIs
 - [zk-org/zk](https://github.com/zk-org/zk) - A plain text note-taking assistant
+- [morgan3d/markdeep](https://github.com/morgan3d/markdeep) - Official public Markdeep source archive
 
 ## linux
 - [linuxhw/DMI](https://github.com/linuxhw/DMI) - Collect dmidecode reports and find most popular CPU, RAM and battery
@@ -930,6 +932,7 @@
 - [pwr-Solaar/Solaar](https://github.com/pwr-Solaar/Solaar) - Linux device manager for Logitech devices
 - [kalbasit/ncps](https://github.com/kalbasit/ncps) - Nix binary cache proxy service -- with local caching and signing.
 - [cheeaun/phanpy](https://github.com/cheeaun/phanpy) - A minimalistic opinionated Mastodon web client
+- [morgan3d/markdeep](https://github.com/morgan3d/markdeep) - Official public Markdeep source archive
 
 ## security
 - [nix-community/vulnix](https://github.com/nix-community/vulnix) - Vulnerability (CVE) scanner for Nix/NixOS [maintainer=@henrirosten]
@@ -1174,6 +1177,7 @@
 - [pwr-Solaar/Solaar](https://github.com/pwr-Solaar/Solaar) - Linux device manager for Logitech devices
 - [Thymis-io/thymis](https://github.com/Thymis-io/thymis) - Web-based platform for configuring, provisioning, updating, and monitoring (IoT-)devices and systems, powered by NixOS
 - [cheeaun/phanpy](https://github.com/cheeaun/phanpy) - A minimalistic opinionated Mastodon web client
+- [morgan3d/markdeep](https://github.com/morgan3d/markdeep) - Official public Markdeep source archive
 
 ## webdev
 - [thephpleague/flysystem](https://github.com/thephpleague/flysystem) - Abstraction for local and remote filesystems
@@ -1288,6 +1292,7 @@
 - [Qloapps/QloApps](https://github.com/Qloapps/QloApps) - QloApps is a Free and Open-source hotel management and reservation system to take a hotel business online. QloApps offers a Property Management System (PMS), a Booking Engine, and an attractive Hotel Website. Elevate hotel operations with QloApps to streamline processes and provide an enhanced experience for both hoteliers and guests.
 - [spatie/sheets](https://github.com/spatie/sheets) - Store & retrieve your static content in plain text files
 - [cocur/slugify](https://github.com/cocur/slugify) - Converts a string to a slug. Includes integrations for Symfony, Silex, Laravel, Zend Framework 2, Twig, Nette and Latte.
+- [morgan3d/markdeep](https://github.com/morgan3d/markdeep) - Official public Markdeep source archive
 
 ## work
 - [oeg-upm/devops-infra](https://github.com/oeg-upm/devops-infra) - Public repository for an ontology network on DevOps infrastructure