diff --git a/README.md b/README.md
index 4901a19..6e46e36 100644
--- a/README.md
+++ b/README.md
@@ -19,11 +19,11 @@ If you want to contribute through a pull request, make sure to add new entries t
 
 # Summary
 
-To date, **362** apps/tools covered, divided in **32** categories.
+To date, **363** apps/tools covered, divided in **32** categories.
 
 # Index
 
-[Backup](#backup) (9) | [Chat and instant messaging](#chat) (7) | [Conversion](#conversion) (4) | [Data management](#data-management) (11) | [Data transfer](#transfer) (21) | [Editors](#editors) (16) | [Email](#email) (8) | [File and file system handling](#file-handling) (31) | [File manager](#file-manager) (8) | [File systems](#file-system) (3) | [Font management](#font) (2) | [Funny tools](#funny) (9) | [Games](#games) (18) | [Graphics](#graphics) (8) | [Networking](#networking) (7) | [Office tools](#office) (10) | [Organizers and calendars](#organizers) (21) | [Productivity](#productivity) (12) | [Programming](#programming) (4) | [Security and encryption](#security) (15) | [Shells](#shells) (3) | [Sound and music](#music) (14) | [System monitoring](#monitor) (20) | [System tools](#system) (7) | [Terminals](#terminal) (7) | [Text processing](#text-processing) (14) | [Text search](#text-search) (6) | [Utilities](#utility) (26) | [Versioning](#versioning) (15) | [Viewers](#viewers) (12) | [Web browser](#browser) (8) | [Web development](#webdev) (6)
+[Backup](#backup) (9) | [Chat and instant messaging](#chat) (7) | [Conversion](#conversion) (4) | [Data management](#data-management) (11) | [Data transfer](#transfer) (21) | [Editors](#editors) (16) | [Email](#email) (8) | [File and file system handling](#file-handling) (31) | [File manager](#file-manager) (8) | [File systems](#file-system) (3) | [Font management](#font) (2) | [Funny tools](#funny) (9) | [Games](#games) (18) | [Graphics](#graphics) (8) | [Networking](#networking) (7) | [Office tools](#office) (10) | [Organizers and calendars](#organizers) (21) | [Productivity](#productivity) (12) | [Programming](#programming) (4) | [Security and encryption](#security) (15) | [Shells](#shells) (3) | [Sound and music](#music) (14) | [System monitoring](#monitor) (20) | [System tools](#system) (7) | [Terminals](#terminal) (7) | [Text processing](#text-processing) (15) | [Text search](#text-search) (6) | [Utilities](#utility) (26) | [Versioning](#versioning) (15) | [Viewers](#viewers) (12) | [Web browser](#browser) (8) | [Web development](#webdev) (6)
 
 Some links to [related resources](#resources).
 
@@ -381,6 +381,7 @@ Some links to [related resources](#resources).
 
 * [BaFi](https://mmalcek.github.io/bafi/) - Universal JSON, BSON, YAML, CSV, XML translator to ANY format using templates.
 * [ccat](https://github.com/jingweno/ccat) - A `cat` command with colorized output.  
+* [deadlink](https://github.com/nschloe/deadlink) - Parses text files for HTTP URLs and checks if they are still valid. Good to use on markdown documentation files.
 * [delta](https://github.com/dandavison/delta) - A syntax-highlighter for git and diff output.
 * [diff-so-fancy](https://github.com/so-fancy/diff-so-fancy) - Make your diffs human readable instead of machine readable.
 * [fzf](https://github.com/junegunn/fzf) - (FuZzy Finder) is a general-purpose command-line finder with fuzzy search/filter capabilities; good integration with `vim`.  
diff --git a/data/apps.csv b/data/apps.csv
index 2d1b88d..e0528f6 100644
--- a/data/apps.csv
+++ b/data/apps.csv
@@ -361,3 +361,4 @@ file-handling,Jmp,https://github.com/gholmes829/Jmp,Change directory with smart
 file-handling,llama,https://github.com/antonmedv/llama,Minimalistic file opener and directory changer focused on fuzzy searching the path.
 versioning,Gitea,https://gitea.com/,Single binary self-hosted Git service.
 versioning,Soft Serve,https://github.com/charmbracelet/soft-serve,Self-hostable Git server for the command line. One distinguished feature is the possibility to create new repositories with a push.
+text-processing,deadlink,https://github.com/nschloe/deadlink,Parses text files for HTTP URLs and checks if they are still valid. Good to use on markdown documentation files.