Mac OS X Softwares to Filtering and Sorting

OpenProj was a powerful, open-source project management software designed as a free alternative to commercial applications like Microsoft Project. It offered a robust set of features for planning, scheduling, and managing projects, including Gantt charts, PERT charts, and resource allocation.

OmniFocus is a powerful task and project management application designed for individuals and teams who need advanced tools to stay organized and productive. Based on the Getting Things Done (GTD) methodology, it provides a structured framework for capturing, organizing, and completing tasks across multiple devices.