hidemyipvpn

Allows your visitors to see their IP address and location in a beautiful widget, compatible for full page views or sidebar views.
<h3>IP Lookup API</h3>
This plugin uses the IPF1 API at: 
https://api.ipf1.com/
The API is used to return the IP location data such as the country, region, and city location of the requested IP address.
The API does not collect or store any lookup requests and does not require any account or authentication to use the API. 
There is no warranty or guarantees for the accuracy or availably of the IP lookup API. Full documentation for the API is available at: 
https://api.ipf1.com/doc.html
The API terms available here: 
https://api.ipf1.com/terms.html

Free IP Lookup Widget

Allows your visitors to see their IP address and location on your Wordpress site.

Alex King

Crowd Favorite

A flexible shortcode and lookup tool for creating internal links in post/page content (or anywhere shortcodes are parsed). 
A lookup tool is added to the sidebar of the post edit screen for locating shortcodes for internal posts.
A plugin by <a href="http://crowdfavorite.com" rel="nofollow ugc">Crowd Favorite</a>. We build Big Things with WordPress.

CF Internal Link Shortcode

A flexible shortcode and lookup tool for creating internal links in post/page content (or anywhere shortcodes are parsed).

Free IP Lookup Widget vs CF Internal Link Shortcode