peterwsterling

This plug-in allows you to record a country against your posts. 
For example the country that the post talks about, the event took place in, the location you are writing the post from, etc. Your imagination is the limit… 
Once a post is tagged with a country the plug-in allows flag icons to be added to your blog’s pages with simple additions to your template files. 
Country icons can be clicked on to take the user to a list of posts from that country. 
There’s also a sidebar widget that creates a popup to navigate to posts from that country.
Please consider supporting ongoing development of this plugin by taking a look at the <a href='http://www.sterling-adventures.co.uk/blog/2013/09/01/wordpress-mapping-plugin/' rel="nofollow ugc">enhanced mapping version of this plugin</a> available at the <a href='http://www.sterling-adventures.co.uk/blog/2008/04/01/post-country-plug-in/' rel="nofollow ugc">plugin’s home page</a>. The enhanced version offers a neat mapping interface to your blog with many features such as geo-location of your posts, showcasing <a href='http://en.support.wordpress.com/featured-images/' rel="nofollow ugc">featured images</a> from your posts, presentation of <a href='http://en.wikipedia.org/wiki/GPS_eXchange_Format' rel="nofollow ugc">GPX</a> tracks, GPX elevation graphs, recording countries against your posts, and much much more.
<h4>How to record a Country against a Post</h4>
To add a country to post use the In which Country was the Adventure? box select the country from the dropdown. 
There are also more instructions etc. on this <a href='http://www.sterling-adventures.co.uk/blog/2008/04/01/post-country-plug-in/' rel="nofollow ugc">page</a>…

Post Country

This plug-in allows you to record a country against your posts.

sierramike

This plugin allows you to display a widget containing a list of countries with a flag, a country name and misc information. You can choose if you want to display the country names or not.
It can be used to display scores, sport results, registrations, people participating in an event and much more.
You can edit smcfi.css file to adjust width of elements, or override css classes smcfi-name and smcfi-misc.
Flags are 64×64 pixel sized to be ready for retina displays.
It is forked from jimmywb excellent plugin ‘Simple Link List’ and behaves the same.

Country Flags Info Widget

Enables a widget in which you can display a list of country with flags, names and misc information.

Post Country vs Country Flags Info Widget