Social Media Plugins

I am after some advice on what social media plugins are best for blog sites? My blog site share my article url: http://sharemyarticle.com/ has a basic function the like and send buttons for facebook at the bottom of the posts on the share my article section like this one http://sharemyarticle.com/easy-ways-anyone-can-lose-that-weight/

but no share/login/ or tweet for twitter options

What plugin should i be using? I’m currently using the WordPress Facebook Like Plugin

Thanks