The Top Ten To-Do List Managers on the Web

Ta-Da Lists is one of the easiest online list managers out there. You can use it to create lists for yourself, share them with others, and check off items as you finish them.

Remember the Milk is a fantastic online to-do list manager that gives you many options, including the ability to be reminded of your tasks via many different methods. You can read more about Remember the Milk here: Manage Your To-Do List with Remember the Milk.

Toodledo is a free online to-do list manager that gives you a ton of organizational options, such as folders, subfolders, due-dates, priorities, tags, contexts, goals, notes, time estimates, and more.

Todoist is an extremely user-friendly to-list manager; you can use it to organize your lists as well as create calendars and sub-projects. It's also fully integrated into Gmail and other online productivity tools.

If you're looking for the simplest online to-do list manager possible, you'll probably want to check out Orchestrate.

Not only can you use The Online CEO to make and manage your to-do lists, you also get a neat points system to prioritize your tasks.

If you're looking for a robust to-do list management site, Nozbe is right up your alley. You can make lists, prioritize projects and tasks, even work collaboratively.

Make a list of to-do's, then you get to vote in fun polls. Simple and fun.

Create a task list, set up reminders and groups, make priorities, and more with Hiveminder.

Treedolist is an exceedingly simple online to-do list manager; it's "a hierarchical organiser for tasks, notes, lists, weblinks and RSS feeds."