Add teammapper to the mind mapping section (#3393)

README.md

@@ -1103,6 +1103,7 @@ _Related: [Note-taking & Editors](#note-taking--editors), [Wikis](#wikis)_
 - [Atomic Server](https://github.com/atomicdata-dev/atomic-data-rust) - Knowledge graph database with documents (similar to Notion), tables, search, and a powerful linked data API. Lightweight, very fast and no runtime dependencies. ([Demo](https://atomicdata.dev/)) `MIT` `Docker/Rust`
 - [Mindmaps](https://github.com/drichard/mindmaps) - Open source, offline capable, mind mapping application. ([Demo](https://www.mindmaps.app)) `AGPL-3.0` `HTML5`
 - [My Mind](https://github.com/ondras/my-mind) - Web application for creating and managing mind maps. ([Demo](https://my-mind.github.io/?url=examples%2Ffeatures.mymind)) `MIT` `Javascript`
+- [TeamMapper](https://github.com/b310-digital/teammapper) - Host and create your own mindmaps. Share your mindmap sessions with your team and collaborate live on mindmaps. ([Demo](https://map.kits.blog)) `MIT` `Docker/Nodejs`
 - [Weaviate](https://weaviate.io/) - A cloud-native, realtime vector search engine integrating scalable machine learning models (GraphQL and RESTful APIs). ([Demo](https://github.com/semi-technologies/semantic-search-through-wikipedia-with-weaviate/), [Source Code](https://github.com/semi-technologies/weaviate), [Clients](https://weaviate.io/developers/weaviate/current/client-libraries/index.html)) `BSD-3-Clause` `Go`