Mapping APIs & linkage

Here are some commonly used web & mobile mapping APIs;
 GPSVisualizer - My old standby.  Free, simple to use & modify (best in class!)

Leaflet - An Open Source JavaScript Library for Mobile Friendly Interactive Maps
Mapbox - An open source mapping platform for custom designed maps. Their APIs and SDKs are the building blocks to integrate location into any mobile or web app
CartoDB -  Cloud Based Solution for your dynamic data, not free
ArcGIS - The Autocad of GIS programs.  Widely used for the most sophisticated apps out there
Google Earth - The Google Earth plug-in allows you to navigate and explore geographic data on a 3D globe using a web browser
WhirlyGlobe -  Is a native iPhone Android API which displays a dynamic globe for your location data.  Very Cool!

TileMill & MapBox decoded - My First MapBox map