Large parts of Android are written in Java and its APIs are designed to be called primarily from Java. That said, it is possible to develop C and C++ apps using the Android Native Development Kit (NDK), however it isn't something that Google promotes. According to Google, the NDK will not benefit most apps.

1) Adobe Flash (Flash/AIR), 2)Ruboto (Ruby), 3)Xamarin 2.0, 4)Basic4android, 5)Appcelerator Titanium, 6)ItelliJ IDEA (Altenrative IDE, Java).

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