Xamarin.Android - Integrated environment for building not only native Android but iOS and Windows apps too.
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
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.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Rider - Rider is a cross-platform .NET IDE based on the IntelliJ platform and ReSharper.
Moqups - The most stunning HTML5 app for creating resolution-independent SVG mockups, wireframes & interactive prototypes for your next project