Here are top 12 most popular social sharing plugins for WordPress websites.
1. Shared Counts
wordpress.org
2. AddToAny Share Buttons
wordpress.org
3. Blog2Social
wordpress.org
4. Sassy Social Share
wordpress.org
5. Social Share Icons & Social Share Buttons
wordpress.org
6. Social9
wordpress.org
7. Social Snap
wordpress.org
8. WordPress to Buffer
wordpress.org
9. Shareaholic
wordpress.org
10. Social Icons Widget
wordpress.org
11. Grow Social
wordpress.org
12. Custom Share Buttons with Floating Sidebar
wordpress.org