online map libs

some of them:

• mapbox  >pricing
• leaflet  >FOSS, simple to use
• OpenLayers  >FOSS, complex, can handle complexity
• Google Maps JS API  >pricing, can handle complexity, google APIs!
• d3.js  >not really a map lib, can handle spatial data viz
• ArcGIS JS API  >enterprise software, powerful
• CartoDB  >not really a map lib, great for spatial data viz