
1. Facebook for Android: It’s no wonder that a Facebook takes the number one spot. With this app you can easily stay connected with your friends all the time. You can share status updates from your home screen, chat with your friends, check out your News Feed, review your upcoming Events, look at your friends’ walls and user info, check in to Places to get Deals, upload Photos, share links, check your Messages, and watch videos.

Download Facebook for Android from Android Market
2.Twitter: Guess what after Facebook? No doubt the position goes directly to twitter. And this Android Twitter is the official Twitter client for Android phones. You can view instant updates from your friends, receives short bursts of timely information on the official Twitter app for your Android phone. Most of all it's so easy to use.

Download Official Twitter App from Android Market
3. Tagged Android App: Tagged is a social networking site where people keep in touch with friends and develop new connections. You can meet one another, make friendships, share common interests, find love, and much more. This Android app is also official directly from Tagged Inc.

Download Official Tagged App from Android Market
4. TweetCaster for Android: Another Twitter app is in the top social apps list. This Android app is made by Handmark. TweetCaster has many innovative features to make your Twitter life easier on Android phone. You can simultaneously post to your Twitter and Facebook through this. It will give you multiple Twitter account support. You can customize your Twitter experience with this.

Download TweetCaster for Twitter App from Android Market
5. Tango Voice & Video Calls: Tango brings you free phone calls and free video calls to your Android device no matter where you are. It allows you to make free phone calls and free video calls over 3G, 4G, and Wi-Fi. Make calls to any other person who has Tango installed on their phone anywhere in the world for free. Start a Tango call with just voice, and easily move into a video call when you have something to share. You can save your money by using this free app on your Android mobile home and abroad. It is also possible to call any Android tablet even Apple iOS running iPhone or iPad. You can use either front or rear camera to make a video call.

Download Tango Voice & Video Calls App from Android Market
6. Linkedin: Linkedin app is great for any professional Android phone users. You can get the latest updates and messages from your network and keep them up-to-date with your status in real-time. LinkedIn for Android puts your professional network just a touch away. Walk into any interview or client meeting with the ability to look up the details and connect with over 100 million professionals worldwide.

Download Linkedin App from Android Market
7. Myspace: If you are a Myspace user then you must need this app. Through Myspace app you will be able to stay connected with your friends.

Download Myspace App from Android Market
8. AIM: AIM app is the best way to connect you to your AIM, Google Talk and Facebook friends from your Android devices. Check-in with foursquare or post your status to Twitter, Facebook, MySpace and Lifestream. You can chat with your Facebook and Google Talk friends by this single app. You can send free SMSs, upload photos, add location status in AIM app. You can configure multiple screen names and switch between identities any time.

Download AIM App from Android Market
9. Orkut: Orkut for Android gives you the best platform to contact and share anything with your Orkut friends. You can send photos directly from your camera album to Orkut account. You can browse all your friends or call them up from a live folder. Micro-blog your status updates and observations.

Download Orkut App from Android Market
10. Video to Facebook: Video to Facebook is a great app for your Android mobile for uploading video directly from your mobile phone. You can record a video, upload it, post it you your wall, even managing the privacy settings all in a minute by this app.

Download Video to Facebook App from Android Market
Source: Android Market