Here’s a free, Mac OSX only, To-Do List manager called Doit. LifeHacker first posted this and I am downloading it. It looks like a great little time management tool.
Each to do item can be linked with a file on your computer, a URL, such as the address of a website, or a contact from your address book. The linked item can be opened directly from the Do It window. To do items can also include notes, priorities and deadlines, which can be set as reminders in iCal.
Mac users can download Doit from jimmcgowan.net
Let me know what you use and if there are comparable free Windows apps like this.