XMLFoundation
The fastest XML Parser that exists. Portable HTTP Services.
...This 15 year old project is stable, it originated from the NCIS (National Clinical Info System) project, now used in many applications for portability, performance, and the core TCP and XML integration features in the library.
Uses a textbook pure "Object Oriented" design and architecture that simplifies mapping XML into the application layer objects.
http://www.codeproject.com/Articles/37850/XMLFoundation
http://about.me/brian.aberle
http://www.codeproject.com/KB/XML/XMLFoundation.aspx