Love or loathe them, sharing buttons will not go away for a while. The default social media sharing scripts provided by the networks themselves are big, often download multiple files and track users across the web.

This generator outputs social media sharing buttons that do not use JavaScript, which means they load incredibly fast (they only use a single HTTP request), don't block your website from rendering, are accessible and don't track the user. (Also, they look nice and follow the brand guidelines where applicable!)