any.DO
Any.do
Platforms: Android, iPhone (coming)
It’s more than just a “to do” list. Any.do provides a clean way to organize your day, week, and year with a list of items to accomplish. But also this little app provides wonderful integration with your contacts, and phone application. For example, you need to call your mom. Well Any.do will include a button to directly call your mom right from the tasks list. Moreover, if you miss a call, Any.do can automatically add a task telling you to call them back. Finally, you can even invite people to join in on tasks for things like group projects.
Cost: free
Link: http://www.any.do/