Antetype UI designer is a brand new, ground-breaking design application that supports user-interface designers at every step of their work. Design beautiful interfaces, invent new widgets, style them, and put it all together in an interactive prototype!

Features:

• Advanced Layout Engine: Any complex layout can be realized with nesting, tables, and flow layouts. Elements can stretch and shrink to adapt to the available space or their content's size.
• Platform-Independent Web Viewer: Screens designed with the Mac version can be viewed in the free Web viewer. Enjoy Antetype's advanced layout engine right in the browser.
• Shared Widget Library: The widget library is available in all projects. Changes made to existing widgets or completely new custom widgets can be synced application-wide and made available in any Antetype project.

Above download is a 30-day trial. Registration by email address required.