Do It (formerly known as ToDo) is a very nifty, tricked-out task or to-do management app that features everything but the kitchen sink — Address Book integration, Quicksilver plugin, syncing, lists for each context, skins and more.

In the app’s readme file, the developer describes it as “a small application to manage categorized to do lists. Each to do item can be linked with a file on your computer, a URL, such as the address of a web site, or a contact from your address book. The linked file or URL can be opened directly from the Do It window.”

The interface is nicely done.

Clicking the orange arrows moves from one category (or Context for GTDers) list to the next, and items within each are ordered by priority.

If an item has a file or URL linked to it, clicking the small arrow on the right jumps to the file or web page.

Double-clicking the item’s title allows it to be edited. To edit other details of the item, you need to click the “i” button at the bottom or use ⌘-I:

The details are stored in a “MailTags-like” smoked glass pane.

Hovering the cursor over “To Do …” slides down a Notes field and the “Deadline …” (not visible here because it is expanded already) opens up options to add reminders for the task in iCal, use an alarm and something called “Auto upgrade priority”.

I couldn’t work out what that last options does, but it sounds pretty cool.

Dragging a file from Finder or a URL from your browser over the Linked Item box stores it with the task. Here you see the URL of Do It’s web site, but it could just as easily be the TextMate draft of the post.

Do It is designed to be skinned and the developer maintains a list of user-submitted skins:

Quicksilver nuts like me will love the fact that the developer has written a Quicksilver plugin for Do It.

Install it from the Do It menu, quit and relaunch Quicksilver and creating to-do is just a Quicksilver activation keystroke away:

After hitting return, a supplementary dialog appears allowing you to assign the new to-do to the category or context or your choice:

In another nice piece of integration, Do It comes with an Address Book plugin which offers contextual menu options to set reminders to email or phone people in your Address Book:

A similar additional screen lets the reminder be assigned to the category of your choice.

Syncing with .Mac options are controlled within the app’s Preferences.

As if all of that is not unbelievable enough, Do It is freeware.

You can get a copy of it from the developer’s web site .not apple mail, productivity, ical, to-dos, task management, quicksilver, syncing, address book, plugin, Jeepers this is slickSimilar Posts:

• Do It 2.4: Nifty task list app gets more nifty
• Emailing a file with Quicksilver
• Mail.app/iCal/kGTD/DEVONthink Pro to get things done
• Ghost Action GTD app: simple, slick, syncing
• Quicksilver and Gmail, Thunderbird