ViaList

From XLT Software:

ViaList is software that helps your club, group, committee, or family stay organized and up-to-date. It lets you share any kind of list--things to do, contact information, agendas, ideas, whatever you need--as easily as sending an e-mail. Once you've "posted" a list, everyone whose e-mail address you selected will be able to read and update the list on their own time. ViaList makes sure that all users of the list get each others' updates, keeping everyone "on the same page.

View larger image