"There are millions of task apps out there," said Jonathan Smiley, Design Lead at ZURB. "We could not find a dead simple no sign up way to make a list and knock out tasks. So we created Strike."

As you can see, it's a to-do list, like any other. But Smiley says there are a few simple things that set it apart - there's no sign-in required, it's easy to share and it's easy to customize.

Users can pull items off the list to delete them, drag them around with their mouse to re-order them and change how list items change when they're marked as complete. If you want them to stay there as a reference, you can choose the strike option, which shows the item with a line through it. Or you can have the item move below the list or disappear all together. Of course, the service is completely free and doesn't require a login. And the final piece that pulls it all together is the sharing - each to-do list gets its own shortened URL to share with friends co-collaborators. 

Correction: This story previously said that the makers of this app also created task-management app Producteev. This was incorrect and that section of the story has been removed.