We recently use Loginradius for social login and Addthis for social like buttons, which bring a lot of overhead to the site.
Without affecting the existings users login and likes-shares, the free lancer is requested to install a similar version which doesnt link to third party sites except Facebook, Google and Twitter. Nothing special compared to existing add ons. And we have similar running in hobievi dot com, so templates will be more or less same.
1) LOGIN: Facebook, Google, Twitter login buttons must be automatically changing with users language of respective site. If user doesnt have account, account must be autoamtically created. Name, Last Name, Email, DoB, City must be extracted and inserted. Login buttons will be placed in [url removed, login to view], create_account.php. On top, there will be side box similar to enclosed (bm_login); but it will also include conventional login fields (email-password). Once logged in, box will show "Logoff, and My Account" links.
2) LIKE/SHARE. It will include Facebook, Google like buttons along with share popups, and Twitter share.