Google Calendar - Spend less time managing your day & more time enjoying it
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
Zoho Calendar - Zoho Calendar is a business calendar that comes along with the Zoho Mail suite of applications. Make your schedules click by effortlessly managing events with Zoho Calendar.
jquery-calendar - A responsive jquery calendar scheduler built with bootstrap and moment.js
Morgen.so - All-in-one Calendar, Tasks & Scheduler. Morgen is the single hub for everything that revolves around time management.
Yahoo! Calendar - You can view an entire month or focus on a specific date and time.