Task Coach is a simple open source todo manager to manage personal tasks and todo lists. It grew out of my frustration that well-known task managers, such as those provided with Outlook or Lotus Notes, do not provide facilities for composite tasks. Often, tasks and other things todo consist of several activities. Task Coach is designed to deal with composite tasks.

Features:

• Creating, editing, and deleting tasks and subtasks.
• Tasks have a subject, description, priority, start date, due date and a completion date.
• Tasks can be viewed as a list or as a tree.
• Tasks can be sorted by all task attributes, e.g. subject, budget, budget left, due date, etc.
• Several filters to e.g. hide completed tasks or view only tasks that are due today.
• Task status depends on its subtask and vice versa. E.g. if you mark the last uncompleted subtask as completed, the parent task is automatically marked as completed too.
• Tasks can be assigned to user-defined categories.
• Settings are persistent and saved automatically. The last opened file is loaded automatically when starting Task Coach.
• Track time spent on tasks. Tasks can have a budget. Time spent can be viewed by individual effort period, by day, by week, and by month.
• The Task Coach file format (.tsk) is XML.

What's New in version 0.76.1:

Bugs fixed:

• The notes and attachment columns were not properly refreshed after removing the last note or attachment. (2894530)
• Reminders would randomly not work. (2888688)
• Recurrence frequency would be reset to zero when edited. (2895085)
• Instead of the whole description, show only the first few lines of descriptions in the description column of task, note, and category viewers.

Features added:

• On Mac OS X, you can optionally choose to use Growl for reminders. When enabled, this disables two other features: snooze/don't snooze and open task on reminder.
• Added back the possibility to hide active tasks so that people can have a task viewer that only displays completed tasks.