IE Developer Toolbar
http://www.microsoft.com/downloads/details.aspx?FamilyID=e59c3964-672d-4511-bb3e-2d5e1db91038&displaylang=en

There were two different XSLT processors implemented in PHP 4: Sablotron (in the more widely used and known xslt extension), and libxslt (within the domxml extension). The two APIs were not compatible with each other, and their feature sets were also different.

In PHP 5, only the libxslt processor is supported. Libxslt was chosen because it's also based on libxml2 and therefore fits perfectly into the XML concept of PHP 5.

Sablotron
http://www.gingerall.org/downloads.html

Understanding ASP.NET View State
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnaspp/html/viewstate.asp


Web Services and Service-Oriented Architectures
http://www.service-architecture.com/