Scott Schluer

geolocation. A C# class library that will calculate distance and cardinal direction between two sets of coordinates and provides the lat/long boundaries around an origin coordinate allowing for simple SQL or LINQ selection of locations within the given radius.

highrise-api. .NET wrapper for 37 Signals Highrise API

geocoder. C# wrapper for geocoding services (currently supports only Google Maps API with plans for Bing support soon). Includes geocoding, reverse geocoding and driving directions.