Check out our round up of online to do lists and task management services.

There are task manager apps out there. There are those that focus on features and provide pretty much every possible feature users wish for and those that take minimalist approach and focus only on a few essential features.

To-Do Lists

Additional Features(apart from 'Create/Delete/Edit Lists and Tasks')

Backpack

email and SMS alerts, sharing, collaboration, adding images and maps to lists

Blablalist

sharing, collaboration, RSS support review)

E2doList (discontinued)

email alerts, sharing

E2do

sharing, collaboration

Gubb

sharing, drag'n drop tasks and lists, retrieve and add lists via SMS or email

Hiveminder

email alerts, sharing, collaboration + RSS support on list updates, manage list via email

Jotlet

email and SMS alerts, sharing, RSS support

[NO LONGER WORKS] Jott

email and SMS alerts, retrieve and add lists via email, create tasks by dialing provided number and leaving a message, sharing, collaboration

Joesgoals

sharing, view task completion performance in a simple graph

Ioutliner

simple to do list with tasks drag and drop option

Iprioritize

drag'n drop tasks and lists, RSS support, sharing

ListPool

sharing, collaboration + email notifications on list updates

Nottr (discontinued)

email and SMS alerts, sharing+ RSS support on list updates

Nozbe

drag & drop lists, categorize lists, prioritize tasks

Orchestrate

simple todo list with tasks drag and drop option

pad.helicoid.net

sharing

Posticky (discontinued)

sharing, add/access lists via email, email and SMS alerts

Remember the milk

receive alerts via E-mail, SMS or instant messenger (AIM, Gadu-Gadu, Google Talk, ICQ, Jabber, MSN, Skype and Yahoo), sharing, add maps to you lists

Rough Underbelly

simple to-do list that lets you graphically display task completion performance

Sproutliner

drag & drop lists, sharing, collaboration

Stickytag (discontinued)

sharing, drag'n drop lists, archive lists, schedule lists to autodelete

Ta-da list

sharing, RSS support

TaskThis

sharing

TaskToy (discontinued)

sharing, add tasks to you lists via email

Time Tracker

simple to-do list with time tracker for tasks.

Toodledo

email alerts, RSS support, sharing, collaboration

TuduLists (discontinued)

sharing, RSS support,

Vitalist

email and SMS alerts, sharing, RSS support, access lists from your mobile

Voo2do

drag and drop lists, add tasks via email, sharing, collaboration

Webtodo

simple straight forward to-do list [add/edit/delete lists and tasks]

Wallnote

simple straight forward to-do list -//-

Workhack

simple straight forward to-do list -//-

Zirr.us

simple straight forward to-do list -//-

Zoho Planner (discontinued)

sharing, collaboration, email alerts, add images and files

(update)

[NO LONGER WORKS] GoogleNotebook

sharing, collaboration, printing, search notes, export to google docs, browser addons (firerfox, IE) that let you ad notes from any webpage

HiTask (HOT)

drag and drop tasks, prioritize tasks, task sharing and collaboration, grouping(by category, date, color, etc.), schedule tasks and more (Recommended)

Nutshell

add notes, print todos/notes, email todos/notes, categorize todos, set priorities

Stikkit

sharing , RSS support

Todoist

schedule tasks, print tasks, order tasks by preference or overdue dates, keyboard shortcuts

Tweeto (discontinued)

simple to do list service, tasks tagging, tasks auto tagging

WorkHack

RSS support, prioritize tasks by colors and size, share task with others, view completed tasks

Zettels

categorize notes, search notes, email notes to others