Installed Eclipse Galileo with Java EE IDE and configured Tomcat-6. There are several projects in workspace which i am not able to deploy with tomcat.
I right-click on Tomcat (in the Servers view) -> Add and remove... -> a window appears in which there are two textbox
1. available and 2. Configured.
i can not see any project in available text-box, Why ? is there anything i am missing to install/configure? Please see below the image

Your project are not typed as web app otherwise you would have a little globe on project.
Check your project facets