Where is my app placed when deploying to Tomcat using IntelliJ IDEA?

Just for reference, the corresponding folder on a mac (for IntelliJ 13) is:

/Users/<username>/Library/Caches/IntelliJIdea13/tomcat/

If you are using Intellij IDEA your artifacts are deployed directly from output directory: ${project.dir}\${web.module}\out\artifacts or ${project.dir}\${web.module}\target if you're using Maven and follow Standard Directory Layout.

Tomcat configuration is in different folder.

Mac:     /Users/${user}/Library/Caches/IntelliJIdea${version}/tomcat/  
Linux:   /home/${user}/.IntelliJIdea${version}/system/tomcat/
Windows: C:\Users\${user}\.IntelliJIdea${version}\system\tomcat\

Yes, If you are using IntelliJ IDEA the application does not turn up on Tomcat webapps directory. Your artifacts are in directory, for example:

${dir.to.idea.project}\YourWebApp\out\artifacts

This is default directory created by IntelliJ.

Tomcat configuration is in the different folder. I am using windows 7. So it is:

C:\Users\User\.IntelliJIdea10\system\tomcat\YourApplicationName