Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
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.
Visual Studio Code - Build and debug modern web and cloud applications, by Microsoft
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.
Xcode - Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.