I've got to do some geospatial work, so I'm collecting links to various mapping, location and geospatial APIs here. If and when I work with these APIs, I may add some notes, too.
- Leaflet — Javascript interactive maps library
- OpenLayers — another Javascript maps library
- Turf.js — Geospatial analysis library. Some additional info at https://www.mapbox.com/analysis/
- Static Map Maker — a helper service for creating static maps with many of the APIs listed above.
- GeoJSON — AKA RFC 7946. A standard format for simple geospatial features and metadata.
- geojson.io — online rendering of GeoJSON data.