dotPeek - dotPeek is a free tool based on ReSharper. It can reliably decompile any . NET assembly into C# or IL code. Download dotPeekCommunity. Materials Newsletters, webinars.
Xamarin.Android - Integrated environment for building not only native Android but iOS and Windows apps too.
dnSpy - .NET assembly editor, decompiler, and debugger
Rider - Rider is a cross-platform .NET IDE based on the IntelliJ platform and ReSharper.
Java Decompiler - Yet another fast Java decompiler
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.