GNOME Online Accounts provides interfaces so that applications and libraries in GNOME can access the user's online accounts. It has providers for Google, ownCloud, Facebook, Flickr, Foursquare, Microsoft Account, Pocket, Microsoft Exchange, IMAP/SMTP and Kerberos.
This is a companion discussion topic for the original entry at https://copr.fedorainfracloud.org/coprs/xwaver/gnome-online-accounts/