VenoMaps is a WordPress plugin to create custom maps to be placed anywhere:
Contact pages, posts, sidebars, footer widgets, or directly into your theme’s files.
World capitals by countries.
Start typing to search and get suggestions bsed on infobox contents
Custom maps
Custom markers
Custom clusters
Search and filter
Select a custom style and a size for the map, upload your custom markers, set the map’s and the markers’ coordinates, insert some text for the popup info boxes and publish your map.
Search the block VenoMaps and place it anywhere.
Select a Map, set its size, zoom level and clusters colors.
VenoMaps is an alternative to Google Maps, it is based on OpenLayers and OpenStreetMap, doesn’t require API keys and offers different custom maps.