WeTime - No more back and forth between Gmail and Google Calendar, schedule your meetings from within your...
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
Framadate - Make your polls
Dudle - Dudle is an online scheduling application, which is free and open source.
Vyte - Free and easy scheduling application for professionals.
FullCalendar - FullCalendar is an open-source JavaScript event calendar.