Tasks lets you manage your to-do list while you’re on the go. You can create lists of things you need to get done and check off tasks as they’re completed. Just go to http://gmail.com/tasks in your phone’s web browser to access Tasks.

If you’ve already installed Tasks on Gmail, they will show up automatically. As you add or cross out tasks, they are automatically synced with your task list on Gmail. In addition to a stand-alone to-do list, you can also now convert e-mails into tasks. Unfortunately, you cannot yet share task lists with others or make lists if your mobile phone is not connected to the Internet.

More info: Google Tasks list