Link file sync section to groupware, fixes #162

README.md

@@ -264,6 +264,8 @@ CMS are a practical way to setup a website with many features. CMS often come wi
 
 ## File Sharing and Synchronization
 
+Some [Groupware](#groupware) solutions also feature file sharing synchronization.
+
   * [BoZoN](https://github.com/broncowdd/BoZoN) - Minimalist Drag & drop file sharing app `AGPLv3` `PHP`
   * [Camlistore](https://camlistore.org/) - Camlistore is a set of open source formats, protocols, and software for modeling, storing, searching, sharing and synchronizing data in the post-PC era. Data may be files or objects, tweets or 5TB videos, and you can access it via a phone, browser or FUSE filesystem. ([Source code](https://github.com/camlistore/camlistore)) `Apache` `Go`
   * [Coquelicot](https://coquelicot.potager.org/) - Coquelicot is a “one-click” file sharing web application with a focus on protecting users’ privacy. - `AGPLv3`