ActiveRecord connection adapter for PostGIS, based on postgresql and rgeo
GDAL/OGR bindings for ruby
Complete Ruby geocoding solution.
Official Geokit plugin for Rails/ActiveRecord. Provides location-based goodness for your Rails app. Requires the Geokit gem.
Graticule is a geocoding API for looking up address coordinates and performing distance calculations, supporting many popular APIs.
Create beautiful JavaScript maps with one line of Ruby
Geospatial data library for Ruby