SAPUI5 Developer Studio provides tools to ease the UI5 development process. Following are the functions −
You can download it from SAP Marketplace using the link https://support.sap.com/software.html Search for UI Add-on 1.0 for NetWeaver.
Go to Software downloads and enter your Id and password. Then, go to support packages and patches. Search for sapui5 tools ide plugin 1.00.
A trail of SAPUI5 framework is also available under SCN. You can go to this link http://scn.sap.com/community/developer-center/front-end