I’ve played around with a lot of Social Share plugins over the years, but I’ve recently become a fan of Social Warfare.
There’s a free version in the WP repository which works just fine, but if you’re serious about social sharing traffic generation their PRO version is very impressive.
The Pro version may seem a bit pricey, but it’s all relative.
If you’re spending money on paid traffic, a good social plugin could potentially triple your visitors. So say $100 in advertising gets you 500 visitors, having a good sharing plugin might be worth $200 in free traffic.
Social Warfare Pro