Taskfabrice (http://www.taskfabric.com/) has released Organize for Mac OS X and Windows. It’s a personal task management app designed with business users in mind.
Contacts supports such organizational methods as GTD (Getting Things Done), Contexts, RACI or AID. It includes review features (i.e. by date, context or with the Project Dashboard) and lets you use Cloud Sync (Internet) or Wi-Fi to synchronize with Organize on another Mac, Windows, iPhone and iPad.
Organize for Mac and Windows is available immediately as download from our web site http://www.taskfabric.com/. Registration is US$39.95. On the Mac it requires Mac OS X 10.6 or later.