Xamarin.Android - Integrated environment for building not only native Android but iOS and Windows apps too.
Rider - Rider is a cross-platform .NET IDE based on the IntelliJ platform and ReSharper.
Qt Creator - Qt Creator is a cross-platform C++, JavaScript and QML integrated development environment. It is the fastest, easiest and most fun experience a C++ developer could wish for.
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
AppyBuilder - An App Inventor 2 spin-off. Formerly called AILiveComplete.