Email attachments in *my* cloud
Another privacy success story for free software! My Thunderbird email client is now set up to upload and link my large email attachments to my ownCloud server - a system I control. I'd previously avoided Thunderbird's "Filelink" feature as I had to use a file hosting service I didn't control.
I've been running OwnCloud for a few years now for sharing contacts, calendars and syncing Emacs Org-mode data between desktop/laptop/phones. It's working out really well for me.
The Thunderbird plugin I'm using is ownCloud for Filelink.