Matthew

Event-O-Matic has been rewritten for WordPress 4. View details below.
The Event-O-Matic is an amazing plugin that allows rapid publishing of event listings to your website. Event-O-Matic allows your users to submit their own events and gives you the ability to moderate these events as they arrive to your site. Edit or reject submitted events and add them to your listings for the ultimate social driven event service. Event-O-Matic is also fully integrated with Google Maps to give each event clear location information within your city. View more information <a href="http://garvinmedia.com/eom" rel="nofollow ugc">here</a>.
Other features:
<ul>
<li>Easy media upload for events.</li>
<li>Sidebar widget with upcoming events listings.</li>
<li>Admin Dashboard for quick status previews.</li>
<li>Updated Google Maps Geolocation service.</li>
<li>Exportable to iCal formats</li>
</ul>

Event-O-Matic

Manage submissions to build a community-driven event listing. Allow users to submit events that you can easily review and moderate.

Md Imranur Rahman

LocalGrid Plugin is use CityGrid API which has free 18M business list for the USA . User need to get the citygrid publisher key 
to use this plugin thats it .
Important Links:
<ul>
<li><a href="http://developer.citygridmedia.com/dashboard/registration" title="Registration page" rel="nofollow ugc">CityGrid API key</a></li>
</ul>
<h4>Features</h4>
<ul>
<li>Business List : You can add custom business list for places,deals,reviews.</li>
<li>Business list preview : Before add your business list you can preview the result in the admin panel </li>
<li>Output Customization : You can customize your Title,arredss,description font color size etc . </li>
<li>Sortcode for Business list : you will select the business list from dropdown and set the <code>[localgrid]</code> shortcode in the content .</li>
<li>Shortcode for the Allcity : To browse all city with all populare category you can just set the <code>[allcity]</code> shortcode in your page .</li>
<li>Shortcode for Custom Search : To make a custom search for business list you use <code>[localgrid_zipcode]</code> shortcode</li>
</ul>
<h3>Credits</h3>
Copyright 2011-2012 by Md Imranur Rahman & cannyLab
This program is free software; you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published by 
the Free Software Foundation; either version 2 of the License, or 
(at your option) any later version.
This program is distributed in the hope that it will be useful, 
but WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
GNU General Public License for more details.
You should have received a copy of the GNU General Public License 
along with this program; if not, write to the Free Software 
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

LocalGrid

LocalGrid Plugin is the best plugin for the make your site as a directory listing ,deals and reviews site .

Event-O-Matic vs LocalGrid