country-notes
Find country codes, country phone codes, country time zone, ISO2 and ISO3 letter codes of countries. Resource from https://countrycode.org
country-regex
Hash map of country ISO-3 codes to regular expression identifiers
univerlang
convert language codes between various formats such as IOC, ISO2, ISO3, and FIFA codes.
country-list-js
Country list with ISO2, ISO3 code, continent, capital, dialing code