Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
NeedToMeet - Schedule a meeting in a few clicks to find a time that works for everyone.
Framadate - Make your polls
YouCanBook.me - YouCanBook.me is a cloud-based service which allows your customers to schedule appointments and make bookings.
Dudle - Dudle is an online scheduling application, which is free and open source.
HubSpot Meeting Scheduler - Find a time that works without back-and-forth emails with HubSpot's free meeting scheduler. Add it to your website or emails and start booking appointments with ease.