Implementations

Apache Axis
Java platform for creating and deploying web services applications.
http://ws.apache.org/axis/

BEA Weblogic Server
Incorporates Web services utilities and run-time services for integrating applications. WebLogic Server supports generation of Web services interfaces (WSDL) and provides facilities for marshalling and un-marshalling SOAP requests to EJB components.
http://www.bea.com/framework.jsp?CNT=index.htm&FP=/content/products/weblogic/server/

IBM - Web Services Toolkit
A runtime environment as well as demo/examples to design and execute web-service applications to find one another and collaborate in business transactions.
http://alphaworks.ibm.com/tech/webservicestoolkit

NextAxiom Technology, Inc.
Provider of application development solutions based on assembling Web services into composite services without coding. Solutions are used in application integration and business process orchestration.
http://www.nextaxiom.com/

Sun - Java Web Services Developer Pack
Provides standard implementations of existing key Web services standards for Java including WSDL, SOAP, ebXML, and UDDI.
http://java.sun.com/webservices/jwsdp/index.jsp

Virtual Private XML Messaging for Web Services
Provide secure and reliable messaging framework for Web services.
http://www.vpxm.com

Webswell Inc.
Provides integration of software applications by using web services and ebXML.
http://www.webswell.com/