Did you forget some important thing to do today or have you forgot to replay to an important email? Sometimes we even tend to forget our daily routine because of the busy life. To help you remember things and get things done on time it is better to have a to-do list manager. There are several desktop and online to-do list managers available.

Online applications hold an upper hand over desktop applications, you can access them from anywhere. Some of these web application offer you free SMS or email alerts to remind you things on time.

Remember the milk

How many times did you forget to get the milk or change the bottle at your door? Remember the milk is one of the simplest web based to-do list manager. It is very easy to set tasks on this web application to get alerts on set time to remind you. It offers SMS, email and IM alerts so you will always get notified about your tasks even you are not online.

Organizing tasks and lists in Remember the milk is easy and you can access your list from anywhere to add tasks or modify them. You need not worry about tasks getting overlapped with one another, Remember the milk will alert you if you set the same time for two tasks.

Tadalist

Creating an account with this site takes only ten seconds of your time. It features simple user interface you can manage your to-do list in minutes. Tadalist allows you to share your to-do list with others to manage your programs and increase productivity. You can create as many tasks as you want there is no need to delete finished tasks to make room for others. Just mark finished tasks as done. In this way you can keep track of all your tasks both finished and scheduled.

ToDoList

It has got thousands of users managing millions of tasks every day. ToDoList has user friendly interface to make you manage tasks comfortably. It features a built-in calendar so you can schedule tasks according to date to get alerts on said date automatically. You can add sub-tasks and sub-menus to manage your tasks even better. Using ToDoList widgets you can easily integrated it into many web applications like Gmail, iGoogle, Firefox, etc.

Treedolist

Treedolist has got many useful functions like to-do list manager, notes, lists, RSS feeds, etc. It is extremely easy to use this web application to manage to-do lists. Just log in to this site using your OpenID and start managing tasks. You can branch a task to create a sub task and add items by drag and drop functionality.

do.ho

This might be the simplest to-do list manager. It has got only the options that are required to remind you to make things done. Just enter a task to the list and set a time to get reminder, it also features snooze feature to grab your attention if you try to ignore something. It works great with many social networking sites like Twitter, Facebook, etc.