Adobe Air (Window/Mac/Linux): toDoo is a streamlined Adobe Air-based task manager with an emphasis on quick task entry, updating and surveying of pending and completed tasks — both successes and failures.
toDoo sports a small split-pane interface — click on the screenshot above to enlarge it slightly to full size — for task entry and task review. Add new tasks or edit old ones in the top pane, review your existing tasks in the bottom pane. You can easily switch between viewing all your tasks, most recently added, in progress, completed and failed. The inclusion of the failed-tasks tab is an unusual one among task managers but handy to have for periodic review — many popular organisational systems including Stephen Covey's Seven Habits encourage reflection on successes as well as failures.
toDoo is freeware and is available for Windows, Mac and Linux systems with Adobe Air installed. For a screenshot tour check out the How-To Geek link below. Have a favourite lightweight task manager to share? Let's hear about it in the comments.