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:
Multiple Look & Feels: Look and feels are stored globally in the shared library and can be applied with one click. Any project can be shown in any Look & Feel.
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.

Requirements
Intel, Mac OS X 10.6 or later

Version 1.1.4:

After this update, your files will be automatically updated when you open them again.
Opening Antetype is now much faster
Speedup for almost all operations
File sizes (Antetype Documents and Web Viewer) are reduced significantly
New border-styles: dotted, dashed and gradient
Fixes for copy/paste between documents
Fixed inner shadow in table cells
Added Progress dialog for save operation
Export Screens: fixed "Overwrite files"
In some rare cases Antetype files were too big
Fixed rendering issues with border/background
Added Online Help
Antetype is now running as a 64bit application
Added support for pasted rtf-texts with background-color
Web Viewer: bug fixes for IE9
Faster loading of the Web Viewer
Enabled Full-Screen Button in OS X Lion
Optimization for shadow drawing
OS X Lion: fixed an issue with gray lines in the screen inspector
Fixes for update/revert widget with more than one embedded widgets
Fixes for undo/redo after adding/deleting cells