dhtmlx

An easy to implement event calendar plugin built on top of <a href="http://dhtmlx.com/docs/products/dhtmlxScheduler/" rel="nofollow ugc">dhtmlxScheduler</a> 
that provides an Ajax-based scheduling interface similar to Google Calendar. The plugin allows you 
to manage single or multiple user events, display any type of events and appointments, and put a list of the upcoming events on a side bar.
Users can add/edit/delete events on the fly and easily change event date and time by simply dragging the event boxes. 
You can set up different levels of permissions to people who will use the calendar: make the scheduler read-only or allow 
a group of users to edit the events through a web-based calendar interface.
The calendar can be configured to display events in Day, Week, Month, Agenda, Timeline view, as well as in any custom view. The intuitive admin panel 
makes it easy to customize the calendar to your needs. You can use the plugin as an event calendar or as archive calendar to display your blog posts archive (in this case it works in read-only mode).
Main Features
<ul>
<li>Day, Week, Month, Year, Agenda, Timeline Views</li>
<li>The ability to create a custom View </li>
<li>Ajax-enabled, intuitive interface</li>
<li>Drag-n-drop support to configure event date and time</li>
<li>Easy-to-customize</li>
<li>Single/multi-day events </li>
<li>Customizable time scale </li>
<li>Recurring events </li>
<li>Configurable access and edit rights</li>
<li>Upcoming events widget</li>
<li>Localization to more than 20 languages</li>
</ul>
What’s New in 3.0
<ul>
<li>Week Agenda View</li>
<li>Map View (integration with Google Maps)</li>
<li>Timeline View</li>
<li>Full day event</li>
<li>The ability to display event creator </li>
<li>Export to/from Google Calendar</li>
<li>Built-in export to PDF and iCal</li>
<li>WPMU support</li>
</ul>
Requirements
<ul>
<li>PHP 5.0 or greater</li>
<li>MySQL 4.0 or greater</li>
</ul>

Event Calendar / Scheduler

Event calendar plugin that allows you to add a nice-looking scheduler/planner with drag-n-drop interface, recurring events, Google Map integration.

theArab

Skedmaker’s Plugin for WordPress is an online schedule and appointment system that lets your clients make an appointment with you via the internet 24 hours a day, 7 days a week, 365 days a year.
Create your own schedule, and get e-mail notices when clients make an appointment with you.
<a href="http://www.skedmaker.com/wordpress" rel="nofollow ugc">Click here to try Skedmaker from your clients’ perspective.</a>.
You don’t have to know a drop of code to use Skedmaker in your WordPress site. Activate the Skedmaker WordPress Plugin and start customizing your schedule in minutes.
Select the duration of your appointments on any day, from 15 minute sessions to full-day appointments.
Allow for multiple appointments at the same time.
Block specific timeframes or disable entire days from being available.
You can also select a range of dates to block out, which helps you to disable your schedule for holidays etc.
Give your clients the ability to schedule themselves at their own convenience ? at any time of the day.
Have a complex schedule? Skedmaker allows you to create “Custom Days” with varying timeframes and number of available appointments.
Enter detailed information about your business including map directions, phone numbers, website physical address and more — which is all emailed to your client when they schedule an appointment with you.
You control every part of your schedule with our easy-to-use administrator pages which you can access through your WordPress Admin page.
List all your future or past appointments on one page with actions to manage your clients appointments.
Send no-show notices by e-mail asking your clients to reschedule if they fail to arrive for their appointments.
Edit the color scheme of Skedmaker to fit your WordPress theme by selecting from a list of predefined patterns.
<h3>Credits</h3>
<h4>Icons by</h4>
<ul>
<li>http://www.fatcow.com/free-icons</li>
</ul>

Skedmaker

Skedmaker is an online appointment booking system that lets your clients make a reservation with you via the internet, 24/7/365.

Event Calendar / Scheduler vs Skedmaker