Downloading WireframeSketcher 6.6 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This software for Mac OS X was originally created by WireframeSketcher. WireframeSketcher for Mac belongs to Developer Tools.
From the developer:
WireframeSketcher is a software tool that helps you quickly 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'll find buttons, checkboxes, trees, tables, you name it. Widget data can be quickly edited in-place.
You may want to check out more Mac applications, such as HexDecBin, wxFormBuilder or ScriptLight, which might be similar to WireframeSketcher.