Link existing social media accounts to drupal account Both upon registration and/or user editing later on, how could one give the user the ability to link his acccount with a plethora of social networks such as Facebook, LinkedIn, Skype, Google+, Twitter, etc?

I am not looking for an oAuth solution to (just) log in or register with one of the afforementioned accounts instead of a standart drupal one, I am looking for a way to give the user the ability to log in and/or register with either one of those accounts.

Is that technically possible? If yes, is there a one-in-all solution modulewise?

EDIT: to give some extra clarity, the ability to link your social networks' account(s) is a requirement upon registration too. Something like a "field-like" behaviour that will somehow store the connection with the social network account. Kinda blunt but you get the idea.
May be you are looking for this module. It supports many providers for register and login integration.

Basic version is free. More details check below link!

http://janrain.com/products/engage/engage-pricing/