TXS provides a basic HTTP server. Its own XML Script language can produce, via XSL-T, XForms or XHTML pages (tested with FireFox). It can also be used to read and generate CSV, XML or ZIP files. HTML page capture and email generation also available.
Small footprint C++ library to extract an XPath 1.0 expression from an XML tree. Uses the TinyXML project to parse XML trees and store intermediate results. Runs on any platform. Optional use of STL. Overhead less than 100KB, including TinyXML.
The HL7 Test Harness system is an HL7 v3 message conformance testing application that also provides the ability to simulate the message processing actions of a client and/or server system. The app provides message workflow, format and content testing.