Axis
Apache Axis is an implementation of the SOAP ("Simple Object Access Protocol") submission to W3C.

Burlap Web Service Protocol
The Burlap web service protocol makes web services usable without requiring a large framework, and without learning yet another alphabet soup of protocols.

Hessian Binary Web Service Protocol
The Hessian binary web service protocol makes web services usable without requiring a large framework, and without learning yet another alphabet soup of protocols. Because it is a binary protocol, it is well-suited to sending binary data without any need to extend the protocol with attachments.

Ivory
Ivory provides easy integration between your exiting java classes, Avalon services, and Axis. It allows easy deployment of soap services with none of the WSDD configuration that Axis normally mandates.

SOAP UDDI
The goal of this project is to develop all the missing pieces that currently exist in deploying an enterprise-level application over web-services platform.

UDDI4J
UDDI4J is a Java class library that provides an API to interact with a UDDI (Universal Description, Discovery and Integration) registry. The UDDI Project is a comprehensive, open industry initiative enabling businesses to (I) discover each other, and (II) define how they interact over the internet and share information in a global registry architecture.

WSIF
The Web Services Invocation Framework (WSIF) is a simple Java API for invoking Web services, no matter how or where the services are provided. Please refer to the release notes before you proceed with using WSIF.

WSIL4J
WSIL4J is a Java class library that provides an API that is can be used to locate and process WS-Inspection documents. This class library can be used to read and parse a WS-Inspection document, as well as generate a new WS-Inspection document.