Scribe
The Scribe library is very helpful for doing OAuth operations for platforms, such as Facebook, Twitter, Google, and so on. Check it out here: https://github.com/fernandezpablo85/scribe-java
This is the stack of the Android library recommendations available on AppShocker. Feel free to browse through them and learn more about Android libraries useful for your Android projects. Remember, try to shock the world with your amazing programming skills.
The Scribe library is very helpful for doing OAuth operations for platforms, such as Facebook, Twitter, Google, and so on. Check it out here: https://github.com/fernandezpablo85/scribe-java
The Guava library is very useful if you intend to create an Android app doing heavy communication with a server. Check it out here: https://code.google.com/p/guava-libraries/
ActionBar Sherlock is a great Android library making it possible for developers to support older Android versions and devices. What it actually does is to make the action bar design pattern accessible and feasible among all Android versions. You can find this library here: http://actionbarsherlock.com/