A graphical user interface builder (or GUI builder), also known as GUI designer or sometimes RAD IDE, is a software development tool that simplifies the creation of GUIs by allowing the designer to arrange graphical control elements (often called widgets) using a drag-and-drop WYSIWYG editor.

The history of the graphical user interface, understood as the use of graphic icons and a pointing device to control a computer, covers a five-decade span of incremental refinements, built on some constant core principles.

SAP GUI is the graphical user interface client in SAP ERP's 3-tier architecture of database, application server and client.

In software engineering, graphical user interface testing is the process of testing a product's graphical user interface to ensure it meets its specifications.