Ubuntu 14.04? Are you plagued by these processes?
doublec+ 1912 0.0 0.5 480936 16784 ? Sl 13:01 0:00 _ /usr/lib/evolution/evolution-source-registry doublec+ 1938 0.0 1.6 1073612 49500 ? Sl 13:01 0:00 _ /usr/lib/evolution/evolution-calendar-factory
What? evolution-source-registry? evolution-calendar-factory?
Me, I don't use Evolution. I use Thunderbird. And I don't use Gnome Contacts. I use the address book in Thunderbird.
Fortunately, there's a pretty simple way to get rid of these processes.
$ sudo aptitude remove libfolks-eds25 gnome-contacts evolution-data-server
Be sure to kill the processes yourself once the packages have been removed.