diff --git a/README.md b/README.md
index 4c44e0bd..1d99b364 100644
--- a/README.md
+++ b/README.md
@@ -728,6 +728,7 @@ See also <https://en.wikipedia.org/wiki/List_of_streaming_media_systems>, <https
   * [Mindmaps](https://github.com/drichard/mindmaps) - An open source, offline capable, mind mapping application. ([Demo](http://drichard.org/mindmaps/)) `AGPLv3` `HTML5`
   * [Musical Artifacts](https://musical-artifacts.com/) - Helping to catalog, preserve and free the artifacts you need to produce music. ([Source Code](https://github.com/lfzawacki/musical-artifacts)) `MIT` `Ruby`
   * [Skygear](https://skygear.io) - A complete backend server for web, mobile and iOT applcations. ([Demo](https://portal.skygear.io), [Source Code](https://github.com/SkygearIO/skygear-server)) `Apache` `Go`
+  * [Ubuntu One](https://insights.ubuntu.com/2015/08/10/ubuntu-one-file-syncing-code-open-sourced) - A file synchronization server. ([Source Code](https://launchpad.net/filesync-server)) `AGPLv3` `Python`
   * [Ulterius](https://ulterius.io) - Ulterius is an open-source remote desktop software with lots of awesome functions. ([Demo](https://ulterius.io/signup/), [Source Code](https://github.com/Ulterius/server)) `MPLv2` `C#`
   * [visualCaptcha](http://visualcaptcha.net/) - A configurable captcha solution, focusing on accessibility & simplicity whilst maintaining security. ([Demo](http://demo.visualcaptcha.net/), [Source Code](https://github.com/emotionLoop/visualCaptcha)) `MIT` `PHP/Nodejs/Ruby/Python`
   * [webtrees](https://www.webtrees.net) - webtrees is the web's leading on-line collaborative genealogy application. ([Demo](https://dev.webtrees.net/demo-stable/index.php?ctype=gedcom&ged=demo), [Source Code](https://github.com/fisharebest/webtrees)) `GPLv3` `PHP`