Open Source Mac Task Managers

Task Coach - Your friendly task manager. Task Coach is a free open source todo manager. It grew out of frustration about other programs not handling composite tasks well. In addition to flexible composite tasks, Task Coach has grown to include prerequisites, prioritizing, effort tracking, category tags, budgets, notes, and many other features. However, users are not forced to use all these features; Task Coach can be as simple or complex as you need it to be. Task Coach is available for Windows, Mac OS X, and GNU/Linux; and there is a companion iOS app.

Feng Office (formerly known as OpenGoo) is a free and open source online project management and collaboration tool, licensed under the Affero GPL 3 license.

Features: web2.0 project- & task-management, timetracking, team organizing, resource management, calendar, interface for your clients and lots more! Content: see license.txt (file section).

Ganib gives simpler ways to keep your projects organized and on track. Take advantage of easy features that help you quickstart and makes your team more efficient and productive. Open source Web based online agile project management collaboration software free, J2EE platform, MySql database with project dashboards & reporting. Organized Teams & Projects: Easily plan & manage projects with intuitive features to help your team deliver on time. Quickly focus on what's important, easily select actions to take. Be efficient for everyday work, project tasks, important details, and timelines. Tasks: Set milestones, tasks, subtasks with duration and dependencies to teams better organized. Scrum: Communicate effectively with your team using scrum, wikis & discussions to make better decisions. ​ Timesheet & Tracking: Track the time spent in real time using gTrack desktop tool with desktop screenshots. Bug Tracking: Manage bugs. Demo: http://www.ganib.com

MyT (Manage Your Team) - is a free open source task management and project management system, based on Yii Framework, easy to use and with a great perspective of growth for the future. You can create one or more Projects and manage several types of Tasks for each one. You can also create and manage Timesheet hours. Myt can send email notifications based on some events, such as Task assignments and Project associations. All features are configurable from the Administration Panel.

Nomad PIM is a free extensible personal information manager. It contains modules for personal notes, journal, address book, personal finances, task management, time tracking and evaluating basic fitness measurements.

ToDoBee is a simple yet powerful task management application for Mac OS X. It is a user friendly and intuitive application that can be used for any IT related project as well as any general day to day task tracking/management situation.