A Sharp today released Opal, the successor to its Acta outliner that brings fluid and responsive outlining to Mac OS X users. Opal enables users to organize lists, track projects, take notes, and store information in an outline. Key features include word counting, the ability to export to Microsoft Word, and planners that can make use of numeric sorting as well as "smart checkboxes" that track task completion automatically. Opal can open 20-year-old Acta outlines, according to A Sharp, and comes with complete documentation allowing users to look up topics offline. Opal is a Universal Binary that runs natively on PowerPC as well as Intel-based Macs, and is available for $32. Opal requires Mac OS X 10.4 or later.