Netbeans - NetBeans IDE 7.0. Develop desktop, mobile and web applications with Java, PHP, C/C++ and more. Runs on Windows, Linux, Mac OS X and Solaris. NetBeans IDE is open-source and free.
MIT App Inventor - App Inventor is a cloud-based tool, which means you can create apps for phones or tablets right in your web browser.
Eclipse - Eclipse is an open source community, whose projects are focused on building an open development platform comprised of extensible frameworks, tools and runtimes for building, deploying and managing software across the lifecycle.
Flutter - Build beautiful native apps in record time ๐
Android Studio - Android development environment based on IntelliJ IDEA
APDE - Android Processing IDE - Source code for APDE: Create and run Processing sketches on an Android device. - GitHub - Calsign/APDE: Source code for APDE: Create and run Processing sketches on an Android device.