omnifocus is excellent for todo's, but it's only for a single user. billings is great for time tracking (has an excellent, easy to use (best in my opinion) wid

omnifocus is excellent for todo's, but it's only for a single user. billings is great for time tracking (has an excellent, easy to use (best in my opinion) widget for starting and stopping your timer), but is also single user lighthouse (lighthouseapp.com) is great for team project manangement