A VPS is a Virtual Private Server also called Cloud Servers or Cloud VPS server is a virtual server you can access anywhere in the world.You can get a free vps trial from a couple of days to a month.A good place to look is http://freevps.us/ you can find out how to get a VPS from them on the site or you can just check this thread out http://freevps.us/thread-1645.html for a relevant list of free VPS providers.Most of the times only Linux VPS is provided but sometimes you can get Windows aswell I've had Windows 2008 VPS and Windows 2003 VPS.It's good if you can't decide on a hosting provider for your needs this way you can try out a few and decide what you want.Or you can just mess around for a few days.