This plugin allows a WordPress Site Admin to enter locations of stores etc into the db. The information is then displayed on the front end 
using the google maps interface. The user can enter a starting location in the search field, the system will then find the closest location from 
it’s starting point and display the path and steps necessary to get to that location. If many locations are available in a similar range range, 
the plugin will request the driving distance between the two closest locations. It help to avoid the pitfall of getting an office across a river 
which may take a lot of driving to get to.
This plugin requires a valid Google Maps API key (free) from Google. If you do not have an API key you may get one here. 
http://code.google.com/apis/maps/signup.html
The actual google maps functionality is based on GoogleMapAPI – A library used for creating google maps. Which can be found here 
http://www.phpinsider.com/php/code/GoogleMapAPI/

GoogleMapper

This plugin allows a Wordpress Site Admin to enter locations of stores etc into the db.  The user can then search for the closest location.

progus

Progus Store Locator lets you add a store or dealer locator to your WordPress site instantly — no API key required. Display your locations on an interactive, customizable map and help customers find nearby stores right after installation.
Key Features:
<ul>
<li>No API key required — works out of the box right after installation. </li>
<li>5 map providers to choose from — Progus Maps, Apple Maps, OpenStreetMap, Google Maps, Mapbox. </li>
<li>23,000+ map styles available — match the map design perfectly to your brand. </li>
<li>IP & browser geolocation — automatically show users the nearest locations. </li>
<li>Translated to 130+ languages — fully localized for global audiences. </li>
<li>100% customizable — edit text, fonts, colors, layout, add custom CSS. </li>
<li>Custom marker creator — design unique map pins and markers. </li>
<li>Shows locations nearby — helps customers find the closest store or dealer. </li>
<li>Advanced analytics — track views, searches, and user interactions. </li>
<li>Powerful bulk import & Google Sheets sync — easily manage large location databases. </li>
<li>Location tags — categorize and filter locations for better user experience. </li>
</ul>
Pricing
Progus Store Locator includes all features for free with a limited number of store locations. 
If you need to add more locations, you can upgrade to a paid plan.
Learn more about available plans: <a href="https://progus.com/store-locator-pricing?platform=wp" rel="nofollow ugc">https://progus.com/store-locator-pricing?platform=wp</a>
Service Integration:
This plugin connects to the Progus Store Locator service (SaaS) to provide store location data and mapping functionality. Upon activation, the plugin automatically registers your site with the Progus service.
External Service Dependencies:
This plugin relies on the following external services:
<ul>
<li>Progus API — https://sl-app.proguscommerce.com/api/wp (registration, auth, management).</li>
<li>Progus Widget (Map) — https://sl-widget.proguscommerce.com/main (embed map via iframe).</li>
<li>Progus Dealer Form — https://sl-form.proguscommerce.com/main (embed dealer form via iframe).</li>
<li>Progus Panel — https://storelocator.proguscommerce.com (management dashboard).</li>
</ul>
Privacy & Data:
<ul>
<li>On admin-initiated registration, plugin sends: site domain, admin email, optional page ID.</li>
<li>Front-end embeds use your site’s <code>psl_id</code> to render widgets; the plugin itself does not track users.</li>
<li>Privacy Policy: <a href="https://progus.com/privacy" rel="nofollow ugc">https://progus.com/privacy</a></li>
<li>Terms of Service: <a href="https://progus.com/terms" rel="nofollow ugc">https://progus.com/terms</a></li>
</ul>
<h3>License</h3>
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

Progus Store Locator Map (No API Key Required)

Powerful map, store, dealer & stockist locator — simple, fast, and customizable.

GoogleMapper vs Progus Store Locator Map (No API Key Required)