Slick social share buttons adds facebook, twitter, google +1, linkedin, digg, delicious, reddit, stumbleupon, buffer and pinterest pin it social media
There are several reasons why this may occur:
The plugin adds the required jQuery code to your template footer. Make sure that your template files contain the wp_footer() function.
If your theme files or another plugin incorrectly loads the jQuery library this may overwrite the plugin files - check your source code to see if jQuery is loaded a 2nd time after WordPress has loaded the file.