BKTraceRoute
The BKTraceRoute v3.0 .NET class collection contains TraceRoute and associated utility classes for tracing the route to one or more remote hosts either synchronously (blocking) or asynchronously (non-blocking). Documentation is provided in .CHM (Compiled HTML Help File) format and examples of use are provided in both C# and VB.NET. Per Developer and Source Code Licensing are available. In both cases, there are no runtime royalties or other fees!