azurecurve

Allows a 16×16 flag to be displayed in a post of page using a [flag] shortcode.
Format of shortcode is [flag=gb] to display the flag of the United Kingdom of Great Britain and Northern Ireland; 247 flags are included.
Defintion of flags can be found at Wikipedia page ISO 3166-1 alpha-2: https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2

azurecurve Flags

Allows a 16x16 flag to be displayed in a post or page using a shortcode.

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.

azurecurve Flags vs Country Flags Info Widget