Add Flagsmith to miscellaneous section (#3847)

README.md

@@ -1330,6 +1330,7 @@ Software that does not fit in another section.
 - [DomainMOD](https://domainmod.org) - Application to manage your domains and other internet assets in a central location. DomainMOD includes a Data Warehouse framework that allows you to import your WHM/cPanel web server data so that you can view, export, and report on your data. ([Demo](https://demo.domainmod.org), [Source Code](https://github.com/domainmod/domainmod)) `GPL-3.0` `PHP`
 - [DOMJudge](https://www.domjudge.org/) - A system for running a programming contest, like the ICPC regional and world championship programming contests. ([Demo](https://www.domjudge.org/demo), [Source Code](https://github.com/DOMjudge/domjudge)) `GPL-2.0/BSD-3-Clause/MIT` `PHP`
 - [F-Droid](https://f-droid.org) - Server tools for maintaining an F-Droid repository system. ([Source Code](https://gitlab.com/fdroid/fdroidserver)) `AGPL-3.0` `Python/Docker`
+- [Flagsmith](www.flagsmith.com) - Flagsmith provides a dashboard, API and SDKs for adding Feature Flags to your applications. Alternative to LaunchDarkly. ([Source Code](https://github.com/flagsmith/flagsmith)) `BSD-3-Clause` `Docker`
 - [google-webfonts-helper](https://github.com/majodev/google-webfonts-helper) `⚠` - Hassle-Free Way to Self-Host Google Fonts. Get eot, ttf, svg, woff and woff2 files + CSS snippets. ([Demo](https://gwfh.mranftl.com/fonts)) `MIT` `Nodejs`
 - [Gophish](https://getgophish.com/) - Gophish is a powerful, open-source phishing framework that makes it easy to test your organization's exposure to phishing. ([Source Code](https://github.com/gophish/gophish)) `MIT` `Go/Docker`
 - [graph-vl](https://github.com/verifid/graph-vl) - Identity document verification using Machine Learning and GraphQL. `MIT` `Python`