Which one of the following provides ready-to-use design templates and resource kits for user interface layout?

The selection of "Gui Designer" as the correct answer is appropriate because it specifically refers to a tool that is designed to assist users in creating graphical user interfaces by offering a variety of pre-defined templates and resource kits. This functionality is critical for streamlining the design process and enabling designers to efficiently create user interfaces without starting from scratch.

The "Gui Designer" typically includes features that allow for easy manipulation of interface elements, preview capabilities, and customization options that enhance usability. By providing ready-to-use design templates, it helps users maintain consistency in layout and style, which is essential in creating visually appealing and functional user interfaces.

In contrast, alternatives like "Gui Builder," "Design Studio," and "Interface Creator" may suggest similar functionalities but don't specifically imply the focus on pre-made design templates paired with resource kits as a core feature. Thus, they may not offer the same level of readiness or ease of use for immediate design tasks that the "Gui Designer" does.