Doodle helps scheduling meetings and other appointments. Doodle is simple, quick, free and requires no registration. Simply set up a poll, send a link to all participants, watch progress online, and finally choose the most suitable date.
Very useful - much clearer and simpler than timebridge which I have used before- timebridge does have more sophistication and enables people to book appointments with you via google calendar - tried it,nobody did - story of my life