Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Netbeans - NetBeans IDE 7.0. Develop desktop, mobile and web applications with Java, PHP, C/C++ and more. Runs on Windows, Linux, Mac OS X and Solaris. NetBeans IDE is open-source and free.
Xamarin.Android - Integrated environment for building not only native Android but iOS and Windows apps too.
C++ Builder - Modern, fast C++. Four platforms, backed by powerful UI and database frameworks.
Kodular - Much more than a modern app creator without coding
IntelliJ IDEA - Capable and Ergonomic IDE for JVM