Socialite.js is a nice and lightweight plugin that provides a very easy way to implement and activate a plethora of social buttons. You can trigger the buttons to work whenever you want (on document load, on article hover, on any event!). Using this social buttons plugin, your page won’t hand on loading, waiting for 50KB of social media files (all its done asynchronously).
Socialite.js also comes with some cool features and benefits like: no dependencies required, loads external resources only when needed, the plugin has less than 2kb when minified and compressed, provides more accessible and styleable defaults/fallbacks, support is currently for Twitter, Google+, Facebook and LinkedIn but you can always extend it with other social networks, mimics native implementation when activated, supported in all browsers (providing the buttons are).
Implement social buttons easily: Socialite.js – Preview