PlayPhone Social (iPhone) - Use PlayPhone Social to stay connected with friends and play social games. Create your profile and invite your friends to join you wherever you go. Get their latest news and let them know what's on your mind
Prevyou for iPhone - Prevyou is an easy way to keep in touch with your friends wherever you are. The app uses your Facebook's friends list to help you connect with your buddies and social groups.
Prevyou shows your friends' locations on a map in real time, so you can quickly see where they are and what they are doing
PSN Friends - PSN Friends allows you to view your PlayStation Network friends list on your iPhone, iPod touch, or iPad.
Note: PlayStation.com is slow so it can take a while to load your friends, even on WiFi
Quickly for Facebook with video chat Pro - Quickly access all Facebook features using your iPhone or iPod touch. You can make video and voice calls, text chat, upload photos and videos, and more
Ravid Video Messenger for iPhone - Ravid is an advanced video messenger for iPhone. It allows you to send video messages to any smartphone user, even if they don't have Ravid installed.
Ravid videos have much better quality than MMS and are efficiently compressed for upload speed
Savi People is a social address book which allows you to easily organize, view and communicate with your contacts, Facebook friends, LinkedIn connections and Twitter followers. The app is also a great contacts manager with excellent grouping capabilities, filters and advanced features like batch operations
SayHi for iPhone - SayHi is an app which can help you make new friends. It shows users nearby on a map and allows you to interact with them.
Meet new people and video chat with them, send text & voice messages, pictures and gifts
Seesmic for iPhone - lets you update and view multiple social networks in an efficient and powerful app. Manage multiple Twitter accounts, your Facebook account, your Chatter accounts, a Ping.fm account and organize all your accounts, searches, trending topics and lists in your customizable dashboard
SmartSync - Facebook Sync - SmartSync keeps your contacts up-to-date with their latest picture and information from Facebook (birthday, status, address, website, company and job title). You can view your contacts' pictures from Facebook when they call you and when you call them.
The app also lets you view all your contacts' birthdays in one convenient place
