Simple Share Buttons Adder
Social Sharing, Smart Popup & Share Buttons by GetSocial.io
AddToAny Share Buttons
Monarch
Easy Social Share Buttons
Plugins will help you.
Mashshare is a free social share plugin which comes with social media buttons that enables your readers to share your content to different social media networks. Here is a guide for how to create social meida buttons with Mashshare plugin, which may be helpful to you.