Where can Portlets be deployed?

Can Portlets be deployed even only on a Servlet container like Tomcat? Thanks!

Technically you need a portlet container to run portlets. But since many such containers come as web apps -which can be deployed in a servlet container- a server like Tomcat is sufficient. Here is an (incomplete) list of portlet containers.
[ December 07, 2007: Message edited by: Ulf Dittmer ]

Thanks for your prompt reply Ulf! So does that mean I only have to add the jars needed to run a portlet? Thanks!

Well, I'd advise to install it as a separate web app first. Then you'll get a feeling of what's involved in setting it up. But essentially, yes, if you copy the jar files (and whatever else is required) to your web app, and make the necessary additions to your web.xml file, then you should be able to run the portlet container as part of your web app.