We all have to plan events once in a while, knowing who is coming, if they are coming or what they are bringing is a huge time-waster.
Here is a free online tool that does everything from simple sign-up of attendees to scheduling time slots and organizing what people are bringing (in the case of our example, a pot luck dinner).
[youtube http://www.youtube.com/watch?v=9OQo4mgHIxM]