a. web services resources
* Quick intro http://www.w3schools.com/webservices/ws_intro.asp
* A list apart article. Very easy to understand http://www.alistapart.com/articles/webservices
* Intro http://www.webreference.com/js/column96/
* W3C Docs: http://www.w3.org/2002/ws/
* WSDL 1.1 http://www.w3.org/TR/wsdl
* WSDL 2.0 http://www.w3.org/TR/wsdl20/
* WADL Description https://wadl.dev.java.net/
* WSDL 1.0, WSDL 2.0, WADL comparison http://www.ajaxonomy.com/2008/xml/web-services-part-2-wsdl-and-wadl

b. soap resources
* Quick tutorial http://www.w3schools.com/soap/default.asp
* Introduction to soap. overview. http://searchsoa.techtarget.com/generic/0,295582,sid26_gci1049566,00.html
* SOAP resources links http://www.soaprpc.com/tutorials/

c. rest resources
* Introduction to REST http://java.dzone.com/articles/intro-rest
* Best practices http://www.xfront.com/REST-Web-Services.html
* Introduction slides http://www.xfront.com/5-minute-intro-to-REST.ppt
* Describe REST web services with WSDL http://www.ibm.com/developerworks/webservices/library/ws-restwsdl/

d. developer tutororials for WS with VB.NET, C#, JAVA, ...
* discussion http://www.devshed.com/c/a/Web-Services/Introduction-to-Service-Oriented-Architecture-SOA/3/
* JAVA http://java.sun.com/webservices/
* JAVA tutorial from sun http://java.sun.com/webservices/docs/1.6/tutorial/doc/
* JAVA + Amazon s3 example http://www.onjava.com/pub/a/onjava/2007/11/07/introduction-to-amazon-s3-with-java-and-rest.html

* .NET tutorial http://www.west-wind.com/presentations/dotnetwebservices/DotNetWebServices.asp
* .NET tutorial http://www.codeguru.com/Csharp/Csharp/cs_webservices/tutorials/article.php/c5477
* C# tutorial http://www.codeproject.com/KB/webservices/myservice.aspx
* VB.NET tutorial http://www.codeproject.com/KB/vb/vbwebservice.aspx

* RUBY tutorial http://www.zorched.net/2006/02/09/ruby-soap4r-for-web-services/
* RUBY tutorial http://kousenit.wordpress.com/2006/08/08/ruby-web-service-clients/
* RubyOnRails tutorial http://webgambit.com/blog/calling-a-net-web-service-from-rails-original/

* PHP Create and consume web services tutorial http://webservices.xml.com/pub/a/ws/2004/03/24/phpws.html
* PHP Tutorial http://talks.php.net/show/webservices

* PERL tutorials http://www.blackperl.com/pwswp/
* PERL & REST http://www.onlamp.com/pub/a/onlamp/2008/02/19/developing-restful-web-services-in-perl.html
* Python documentation http://pywebsvcs.sourceforge.net/

* C++ tutorial http://msdn.microsoft.com/en-us/library/a86z84tw(VS.80).aspx

e. workflow resources (BPEL)
BPELWS 1.1 IBM specification http://www.ibm.com/developerworks/library/specification/ws-bpel/
BPEL tutorial http://www.eclipse.org/tptp/platform/documents/design/choreography_html/tutorials/wsbpel_tut.html
BPEL tutorials and code examples http://www.bpelsource.com/resources/code.html


f. available web services
www.webservicex.net
http://www.webservicelist.com/