Open Street Map: www.openstreetmap.org
OSM Data: http://wiki.openstreetmap.org/wiki/Planet.osm
Imposm: http://imposm.org/docs/imposm/latest/
GDAL: http://www.gdal.org/
Mapnik: http://www.mapnik.org
PostGIS: http://postgis.refractions.net/
Carto: http://github.com/mapbox/carto
Carto Reference: http://mapbox.com/carto/
TileMill:
http://github.com/mapbox/tilemill
TileStream: https://github.com/mapbox/tilestream
MBUtil: https://github.com/mapbox/mbutil
Proj4: http://trac.osgeo.org/proj/
Homepage: http://openlayers.org/
API Docs: http://dev.openlayers.org/docs/files/OpenLayers-js.html
Code: https://github.com/openlayers/openlayers
Homepage: d3js.org
API Docs: https://github.com/mbostock/d3/wiki/API-Reference
Code: https://github.com/mbostock/d3
Awesome easing: http://mapbox.com/easey/
Homepage: http://modestmaps.com/
API Docs: https://github.com/stamen/modestmaps-js/wiki
Code: https://github.com/modestmaps/modestmaps-js
Homepage: http://kartograph.org
API Docs:
https://github.com/kartograph/kartograph.py/wiki/API-Reference
https://github.com/kartograph/kartograph.js/wiki/API
Code:
https://github.com/kartograph/kartograph.js https://github.com/kartograph/kartograph.py
Homepage: http://leaflet.cloudmade.com
API Docs: http://leaflet.cloudmade.com/reference.html
Code: https://github.com/CloudMade/Leaflet
Demo: /leaflet/index.html
Cool things:
Leaflet + Proj4js - https://github.com/kartena/Proj4Leaflet
Marker Clustering - https://github.com/ideak/leafclusterer
Shapefile to GeoJSON:
ogr2ogr -f 'GeoJSON' output.json input.shp
Information about a file
ogrinfo file.shp -al -so
Open Street Map: - see top
Natural Earth: http://www.naturalearthdata.com/downloads/
SRTM Topographic Data: http://www2.jpl.nasa.gov/srtm/