Users

Libaries:

• OpenLayers Demo
• OGR GeoJSON Driver Information
• MapFish Java implementation? https://trac.mapfish.org/trac/mapfish/ticket/73
• GeoJSON Python Library, http://pypi.python.org/pypi/GeoJSON/1.0a3
• Shapely (GeoJSON Geometries)
• GeoRuby

Servers:

• FeatureServer Example
• GeoServer
• WPServer Example
• ArcDeveloper Project Google Group
• MapBender
• Pleiades?
• Knowhere? I Think.
• Mapufacture - Developers API
• CubeSERV WFS from CubeWerx Inc. (example)

Desktop Apps:

• FME
• Cadcorp SIS (I hear? can't find a link)
• Arc2Earth, according to http://tinyurl.com/2oo5o8

Web Services:

• geo:truc
• FireEagle
  • GeoJSON Geometries are currently in pre-draft 2 format: Polygons are not 'deep' enough, need an extra array wrapped around them