http://linuxaria.com/article/installation-of-seafile-open-source-dropbox-alternative-for-teams?lang=en&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Linuxaria_En+%28Linuxaria%C2%BB+English%29
https://github.com/haiwen/seafile/wiki/Enable-Https-on-Seafile-web
http://seafile.com/en/download/
What drew my attention to this was that they have a Raspberry Pi version and apparently it runs ok on said machine. On the face of it it looks like a great way for folks to share files whether they are in a team or not.