Framadate - Make your polls
Dudle - Dudle is an online scheduling application, which is free and open source.
poll.ly - your perfect partner to gather ideas and opinions in real time
FullCalendar - FullCalendar is an open-source JavaScript event calendar.
PollTango - It's a free tool to create online polls : one or two closed questions with a choice of several...
Chacy - The simplest way to vote on ideas between friends