rafallach

Plugin creates language selector widget with country flags for the Stella plugin. 
Plugin can be easly styled by css attached to your wordpress template.
<h3>Source</h3>
Mecrucrial Repository: https://rafallach@bitbucket.org/rafallach/stella-flags-plugin

Stella Flags Widget

Plugin creates language selector widget with country flags for the Stella plugin.

Webgrex

Narinder Singh

Country & Phone Field Contact Form 7 plugin is an add-on for Contact Form 7 plugin. This plugin add two new form tag fields that is Country list (form-tag: country drop-down) and Country Phone extensions list (form-tag: phone number) in Contact form 7.
Country & Phone Field Contact Form 7 helps you in creating a country drop-down list with country flags. The tag field will automatically add countries name in standard drop-down field of contact form 7.
How to add the fields in the contact form 7 
1.) Once you have installed activated the Country & Phone Field Contact Form 7 plugin. 
2.) Add the form-tag “country drop-down” and “phone number” to your form and save the changes.
Requirments: 
* Contact form 7 must be active plugin.
<h4>Recommended Plugins</h4>
The following plugin is recommended for Country & Phone Field Contact Form 7 users: 
* <a href="https://wordpress.org/plugins/contact-form-7/" rel="ugc">Contact form 7</a> by takayukister – With Conact form 7, you can use this plugin. Without contact form 7 this plugin have no needs.

Country & Phone Field Contact Form 7

Add country drop down with flags and phone number with country phone extension fields in contact form 7.

Stella Flags Widget vs Country & Phone Field Contact Form 7