The Joda Time Android library is very helpful dealing with dates, such as for Android apps handling calendars. In particular for Android developers, this library offers the solution for stale timezone data. This means that if you need your app to change its built-in timezone depending on the location of the user, then this is…
The Jackson JSON Processor is a library for parsing JSON files. It says that it is one of the fastest libraries doing this job. Furthermore, it also offers streaming of JSON (reading and writing). Additionally, it has no other dependency except JDK. Check it out here: http://jackson.codehaus.org/
The RoboGuice library by Google is very beneficial for Android development in general. For example, if helps out for checking “null” when you you getIntent().getExtras()? Also, casting findViewByID() to a TextView is also improved by this library. Check it out here: https://github.com/roboguice/roboguice
The ViewPagerIndicator library helps add more functionalities to the ViewPager class in order to improve discoverability of content. Check it out here: https://github.com/JakeWharton/Android-ViewPagerIndicator
The MapViewBallons library is relatively old (approximately 2 years old). Nonetheless, it is still a quite handy library in order to display ballon-like icons on GoogleMaps views in order to indicate the location of venues. I have done a couple of projects using it. You might do some modifications if some functionalities do not suit…