This app replaces the stock dialer and contacts manager on Android devices. It's a sophisticated, feature-rich contacts manager that includes social network integration for your contacts (Facebook, Twitter, Linkedin & Foursquare).
addappt is a capable contacts app that features all of the usual stuff, including the ability to quickly call and text your contacts. Additionally, the app contains some social media features such as updates, photos, emoji, and more.
OS9 Phone Dialer is basically a replica of the iOS dialer app, letting you manage things using a few gestures. Compared to other dialers, it features a bigger dial-pad, which is convenient if you are familiar with T9 Search.