SAPUI5 is the main framework for developing SAP Fiori web applications. Check out this 2-minute video below for a quick overview.
SAPUI5 Development Toolkit for HTML 5
The SAPUI5 Development Toolkit (SDK) is the primary resource for SAPUI5 development. And it’s helpful for designers, too.
If you’re designing SAP Fiori apps that will be built with SAPUI5, you can try out UI control samples and check the available properties in the corresponding API documentation. You’ll also find the latest SAPUI5 features, full documentation on developing apps with SAP Fiori elements, demo apps, tutorials, and more.