WireframeSketcher for Ubuntu and Debian (64-bit) for Linux

WireframeSketcher for Ubuntu and Debian (64-bit) is a software tool that helps you to create wireframes, mockups, and prototypes for desktop, web, and mobile applications. It comes both as a plugin for your Eclipse-based IDE and a standalone application. WireframeSketcher comes with an extensive set of widgets. You will find buttons, checkboxes, trees, tables, you name it. Widget data can be quickly edited in-place. Widgets are very flexible and can be customized using properties or by applying wiki syntax directly in text. WireframeSketcher comes with more than 140 icons.