Official d3.js examples
Community Gallery (tagged with Maps)
Mike Bostock's blog
Mike Bostock's blocks
d3's extra projections
Examples that use d3.geo API functions
Work by Halftone
Minimap with d3
Uniformly Scaled geo thumbnails (Mercator)
World wind map
Tweets about Ukraine
Exploding globe
A rain of meteors
Personal site
Map related projects
Transitioning between projections
Countries by area
Antipodes
Rotating the globe
TopoJSON wiki
TopoJSON example gallery
How TopoJSON works
Command Line Reference
Converting shapefiles to TopoJSON
Gotchas between TopoJSON v0 and v1 (breaking API changes)
Let's make a map
Let's make a bubble map
d3 + Leaflet
Converting shapefiles to GeoJSON