Xamarin.Android - Integrated environment for building not only native Android but iOS and Windows apps too.
Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.
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.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Rider - Rider is a cross-platform .NET IDE based on the IntelliJ platform and ReSharper.
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.