Fusion SOAP
- Implementation of embedded SOAP Client/Server in C language. [Commercial]
- http://www.unicoi.com/fusion_web/fusion_xml_soap_client_server.htm

Wingfoot SOAP
- A Lightweight implementation of SOAP 1.1 for J2ME (CLDC and CDC).
- http://www.wingfoot.com/products.html

SOAP for ColdFusion
- A ColdFusion SOAP client for sending SOAP requests.
- http://www.activsoftware.com/xml/

PEAR::Package::SOAP
- This is a soap integration for PHP (pear package).
- http://pear.php.net/package-info.php?pacid=87

XSOAP toolkit (a.k.a. SoapRMI)
- Implementation of RMI for Java and C++. By SoapTeam, Extreme Computing Lab.
- http://www.extreme.indiana.edu/xgws/xsoap/

NuSOAP - PHP SOAP library
- NuSphere sponsored PHP SOAP library.
- http://dietrich.ganx4.com/nusoap/

gSOAP
- A cross-platform C and C++ implementation. Generates C/C++ source codes for Web service and client applications.
- http://www.cs.fsu.edu/~engelen/soap.html

Spheon JSOAP
- Implementation of SOAP 1.1 (Server and Client) for Java.
- http://sourceforge.net/projects/spheon-jsoap/

EasySoap++
- A cross platform C++ implementation of the SOAP 1.1 specification.
- http://easysoap.sourceforge.net/

TclSOAP
- An implementation of the SOAP protocol in the Tcl scripting language.
- http://tclsoap.sourceforge.net/

SOAP::Lite for Perl
- Implementation of SOAP in Perl, includes modules for XMLRPC and UDDI. By Paul Kulchenko.
- http://www.soaplite.com/

pocketSOAP
- A COM implementation of SOAP client facilities. Originally targeted at PocketPC platform and now also targets Wintel. By Simon Fell.
- http://www.pocketsoap.com/pocketsoap/

IBM SOAP4J
- A Java implementation of the SOAP protocol. It has been superceded by Apache SOAP. By IBM.
- http://www.alphaworks.ibm.com/tech/soap4j

White Mesa SOAP Service Implementation
- SOAP implementation as a Windows NT service. Supports WSDL. By Robert Cunnings.
- http://www.whitemesa.com/wmsoapsvc_about.htm

4S4C
- Aka Simon's SOAP Server Services For COM, a COM component that will invoke methods on COM objects, from a SOAP request message, and return the results as a SOAP response message. By Simon Fell.
- http://www.4s4c.com/4s4c/