Merge branch 'christophdb-patch-1'

README.md

@@ -74,6 +74,7 @@ The goal of this repository is to provide an overview of third party projects in
 - [Contact Importer and Exporter](https://git.sprinternet.at/zarafa_webapp/contactimporter) - The contact importer plugin for the Zarafa WebApp. [Source Code](https://git.sprinternet.at/zarafa_webapp/contactimporter) `unknown license` `stable`
 - [Google2FA](https://www.familiethimm.de/en/google2fa-kopano-zarafa-2-faktor-authentifizierung-2fa-google-authenticator/) - WebApp two-factor authentication with Google Authenticator. [Source Code](https://bitbucket.org/normanth/google2fa) `AGPL` `stable`
 - [Gravatar](https://github.com/flok99/zarafa_gravatar) - Show a Gravatar avatar when no photo is set in the contacts. [Source Code](https://github.com/flok99/zarafa_gravatar) `GPL-2.0` `stable`
+- [Seafile Backend](https://github.com/datamate-rethink-it/kopano-seafile-backend) - This plugin integrates Seafile as a file backend in Kopano and extends the groupware with File Sharing functions.   `AGPL-3.0` `stable`
 - [Switch Editor](https://github.com/MartyJustice/switcheditor) - Plugin for Kopano WebApp to switch between the HTML and plain text editor within an email. [Source Code](https://github.com/MartyJustice/switcheditor) `AGPLv3` `stable`
 - [WebApp Fetchmail](https://github.com/olia-dev/kopano-webapp-fetchmail/releases) - Plugin that integrates Fetchmail into the Kopano WebApp. [Source Code](https://github.com/olia-dev/kopano-webapp-fetchmail) `AGPL-3.0` `stable`
 - [WebApp IMAP Import](https://github.com/oxilion/zarafa-webapp-plugin-imapsync) - Plugin for Zarafa WebApp for importing IMAP accounts. [Source Code](https://github.com/oxilion/zarafa-webapp-plugin-imapsync) `AGPL-3.0` `stable`