Is there an alternative to IIS which can support ASP.NET applications?

[Tom G]

I want to create some ASP.NET web services using visual web developer and the book I have says I need IIS to host the webservices. However I only have windows XP home which doesn't included IIS. I don't really want to pay out for a new copy of windows XP Pro so can anyone recommend an alternative to IIS which can support applications written in APS.NET ?

[Lee H]

I seem to remember IIS is part of a service pack somewhere... so should be free... Oh, thats it... Personal Web Server (PWS) should do the same for development purposes, if it is for the "wider world" then look to get IIS, again though, fairly sure it is an option of Windows Server, so should be part of the server OS if that is what you are looking at doing with eventually.

Have only really played with either of them, so there may be essential differences.