Random name picker?

I'm thinking of running some sort of monthly or weekly draw (specifics not yet decided) to try and boost sales at my store. The idea will be that any purchase made will enter that person into the draw. The persons name will be added into the draw for each purchase made, so theoretically the more purchases made, the more chance they have of winning.
With this in mind I'm looking for some sort if application that I can enter the names into and then let it select a winner or winners at random.
Does anyone know if there is something like this available for the mac?

Searching Google for random name picker resulted in...

http://www.classtools.net/main_area/fruit_machine.htm

It's a classroom tool for choosing random student names to answer questions but it'd work for what you want. LOL

=^.^=

OMG, I can't believe you found this so quickly. I googled for hours last night using various phrases and drew a blank. Thanks so much for this link, it's exactly what I'm after.