There are huge numbers of social WordPress plugins that are available and it’s hard to comment on the best one. It differs from person to person and for me here are some of the best ones which I like:-
• CODECANYON – EASY SOCIAL SHARE BUTTON.
• ULTIMATE SOCIAL DEUX.
• USERPRO V1.5.2 – CODECANYON USER PROFILES WITH SOCIAL LOGIN.
You can pick them or any other that suits you the best.