Socialight is a Vanilla.js library to get social network share counts of your links. Socialight support Facebook, Twitter, Google+, Linkedin, Pinterest and Buffer.
share-this is a Medium-like text selection sharing that allows to create a simple interface to share selected text in a page, in the form of a small popover over the selected portion of text.
goodshare.js is an useful jQuery plugin that will help your website visitors share a link on social networks and microblogs or mobile messengers. Easy to install, SEO friendly, many options for customization of appearance.
Likely is the social sharing buttons that aren't shabby. It supports Twitter, Facebook, Google Plus, Pinterest, VKontakte (ВКонтакте), Odnoklassniki (Одноклассники) etc.
jsSocials is a simple social network sharing jQuery plugin. It's flexible and easily extensible. Configure visual appearance. Choose one of several themes provided. Add any yet unsupported social network if needed.
A simple tutorial which will help to share articles from the webpage to WhatsApp using jQuery.