Headshack today released ChartConstructor 2.0, the latest version of its Mac OS X native project management package. ChartConstructor can be used to create both Gantt and PERT charts to plan and track the progress of projects. New features of version 2.0 include custom calendars allowing greater control over resources, the ability to assign multiple resources to each task, control over the appearance of PERT objects, and numerous other improvements. ChartConstructor 2.0 requires Mac OS X 10.2 or later and is a free upgrade for all registered users of ChartConstructor 1.x. A single user license for new users costs US$45.