Add Notes'n'Todos to Note-taking and Editors (#2533)

Co-authored-by: nodiscc <nodiscc@gmail.com>

README.md

@@ -1162,6 +1162,7 @@ _See also [Wikis](#wikis)_
 - [minimalist-web-notepad](https://github.com/pereorga/minimalist-web-notepad) - Minimalist notepad.cc clone. ([Demo](https://notes.orga.cat/)) `Apache-2.0` `PHP`
 - [MiniNote](https://github.com/n1try/mininote) - Simple Markdown note-taking app with persistence. `MIT` `Nodejs`
 - [Notea](https://cinwell.com/notea/) - Self-hosted note-taking app stored on S3-compatible storage. ([Source Code](https://github.com/QingWei-Li/notea)) `MIT` `Nodejs`
+- [Notes'n'Todos](https://github.com/larspontoppidan/notesntodos) - Write notes and todos online in markdown with tag filtering and date sorting. ([Demo](https://lpss.dk/nnt-playground/)) `MIT` `Python`
 - [Oddmuse](https://oddmuse.org/) - A simple wiki engine written in Perl. No database required. ([Source Code](https://github.com/kensanata/oddmuse)) `GPL-3.0` `Perl`
 - [OpenNote](https://github.com/FoxUSA/OpenNote) - OpenNote was built to be an open web-based alternative to Microsoft OneNote (T) and EverNote. ([Demo](https://foxusa.github.io/OpenNote/OpenNote/#/folder)) `MIT` `HTML5`
 - [Overleaf](https://www.overleaf.com/) - Web-based collaborative LaTeX editor. ([Source Code](https://github.com/overleaf/overleaf)) `AGPL-3.0` `Ruby`