Add stirling-pdf to Document management (#3681)

README.md

@@ -128,6 +128,7 @@ _Related: [Personal Dashboards](#personal-dashboards)_
 - [Fathom Lite](https://github.com/usefathom/fathom) - A simple and privacy-focused web analytics alternative to Google Analytics. `MIT` `Go`
 - [GoAccess](http://goaccess.io/) - Real-time web log analyzer and interactive viewer that runs in a terminal. ([Source Code](https://github.com/allinurl/goaccess)) `GPL-2.0` `C`
 - [GoatCounter](https://www.goatcounter.com) - Easy web statistics without tracking of personal data. ([Source Code](https://github.com/zgoat/goatcounter)) `EUPL-1.2` `Go`
+- [Matomo](https://matomo.org/) - Google Analytics alternative that protects your data and your customers' privacy. ([Source Code](https://github.com/matomo-org/matomo)) `GPL-3.0` `PHP`
 - [Metabase](https://metabase.com/) - Easy, open-source way for everyone in your company to ask questions and learn from data. ([Source Code](https://github.com/metabase/metabase)) `AGPL-3.0` `Java`
 - [Offen](https://www.offen.dev/) - Fair, lightweight and open web analytics tool. Gain insights while your users have full access to their data. ([Demo](https://www.offen.dev/try-demo/), [Source Code](https://github.com/offen/offen)) `Apache-2.0` `Go/Docker`
 - [Open Web Analytics](http://www.openwebanalytics.com/) - Web analytics framework that lets you stay in control of how you instrument and analyze the use of your websites and applications. ([Source Code](https://github.com/padams/Open-Web-Analytics)) `GPL-2.0` `PHP`
@@ -768,6 +769,7 @@ A [document management system](https://en.wikipedia.org/wiki/Document_management
 - [Paperless-ngx](https://docs.paperless-ngx.com/) - A fork of paperless, adding a new interface and many other changes under the hood. Scan, index, and archive all of your paper documents. ([Demo](https://demo.paperless-ngx.com/), [Source Code](https://github.com/paperless-ngx/paperless-ngx)) `GPL-3.0` `Python`
 - [Papermerge](https://www.papermerge.com) - Open Source Document Management System focused on scanned documents (electronic archives). Features file browsing in similar way to dropbox/google drive. OCR, full text search, text overlay/selection. ([Source Code](https://github.com/ciur/papermerge)) `Apache-2.0` `Python`
 - [paper{s}pace](https://dedicatedcode.com/projects.html) - Small web application to manage all your offline documents. Provides a searchable storage for your documents and reminds you of upcoming tasks. ([Source Code](https://gitlab.com/dedicatedcode/paperspace)) `MIT` `Java`
+- [Stirling-PDF](https://github.com/Frooodle/Stirling-PDF) - Local hosted web application that allows you to perform various operations on PDF files, such as merging, splitting, file conversions and OCR. `Apache-2.0` `Docker/Java`
 - [Teedy](https://teedy.io/) - Lightweight document management system packed with all the features you can expect from big expensive solutions (Ex SismicsDocs). ([Demo](https://demo.teedy.io/), [Source Code](https://github.com/sismics/docs)) `GPL-2.0` `Docker/Java`