If you are running a blog or any kind of website, and you’re always trying to encourage more people to talk about and share your pages on social sites like facebook, LinkedIn, twitter etc and posts through a variety of channels, including social media and e-mail.
Following are popular sites which provide you "embed code", After integration embed code, user can share your website on social sites.
1) https://www.addthis.com/
2) https://www.addtoany.com/
3) http://sharethis.com/
