Android Studio - Android development environment based on IntelliJ IDEA
Ruffle - An open source Flash player
Flutter.dev - Build beautiful native apps in record time 🚀
BlueMaxima's Flashpoint - the webgame preservation project.
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.
CheerpX for Flash - its adobe flash player in webassembly