Remember The Milk was created by a small Australian company with the goal of helping better organize (and remember) tasks and to-do items. With RTM, you can sign up for free and connect tasks with your Google or Outlook calendar, get reminders through email or SMS on your phone (or even through Twitter), and much more.
You can also download the app free for your iPhone, iPad, or Android. (There are a few extras available in the Pro version for $39.99/year, such as priority support and the opportunity to assist in testing new features). Check it out!
Note: Wise Penny has no affiliation with RTM -- we're just spreading the word to help businesses!