Now days most people are connected with someone, family, friends, coworkers. It’s easier than ever to share status, locations, pictures, details, directions with anyone you choose. There are several great apps that help you do this. I thought I would share with you some of my favorites.
Facebook- I love that iOS has Facebook integration. This is more useful to share websites, photos and quickly update a status. I do still use the App to browse my feed and see what’s going on.
Twitter- Twitter integration is another great feature of iOS which allows you to update your twitter feed in seconds.
Foursquare- This is a great app to check in and share places you have been with friends. You can earn points and even become the “Mayor” of places you visit often.
tumblr- I am fairly new to tumblr but enjoy the “blog style” of the feed. People can share more than a quick update they can share photos, video and short stories.
Flickr- This is the fancy cousin of Instagram. It just feels more classy and the photos seem to be more “retina” friendly.
Instagram- Still my favorite photo sharing App.
Yelp- It’s social media for restaurants and other locations with reviews and information to help you find the best places to go.
GIFboom- Like to make short movies, gifboom helps you do that share with friends and followers.
These are the ones that I really like. 
.
Source:
http://terrystagg.com/2012/12/30/iphone-apps-social-media/