Here is another plugin that lets you add interactive maps to your website. Mapplic GEO comes with maps of the world, continents and various regions of the world, including many countries. It is built with OpenLayers. It lets you load locations from a spreadsheet. This plugin supports tiled, static and vector sources.
Mapplic GEO comes with over 80 country maps for you to choose from. You can use a CSV file to load all kinds of information to your maps. Sekler is the developer behind this plugin. You can find out more about it here.