JavaScript libraries
Touch enabled jQuery plugin that lets you create beautiful responsive carousel slider

Maps
OpenStreetMap is the free wiki world map

Ecommerce
The World Wide Web Consortium W3C develops standards and guidelines to help everyone build a web based on the principles of accessibility internationalization privacy and security

world maps you can selfhost powered by free openstreetmap vector tiles and opensource software design and host maps with openstreetmap vector tiles and opensource tools maps are compatible with leaflet maplibre gl sdks gis wmtswms xyz map tiles etc