567808bc___Or_Facebook____Rolfje_s_blog__The_Safer_Alternative_
[Original] Calendar, Contacts [The Safer Alternative:] 
Owncloud. In my case, I have bought a $40 Raspberry Pi which is beautifully running Owncloud to sync Calendars over SSL between my iPhone and all my Macs. It requires a bit of Linux skills and isn’t really safe “out of the box”, but can be made pretty airtight. Remember to close all ports and only access Owncloud over SSL (most tutorials wrongly teach you otherwise), and don’t expect high performance from the Raspberry when it comes to rendering browser pages. I’ve added a little script that sends backups to my file server via SMB.
There’s life without Google. Or iCloud. Or Facebook. | Rolfje's blog
The Safer Alternative: