Social Hub - All in One Social is a must have app for all social media users. As its name suggests it contains all popular social networking sites and one can access their favorite social media like Facebook, Twitter, Pinterest, Instagram etc. over this app.
You can access many social networks through this app, few are listed below :

Facebook
Twitter
Instagram
Dribbble
GooglePlus
LinkedIn
Pinterest
Quora
DeviantArt
Bebo