This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
For starters, Weblogic and WebSphere cost serious money, while Tomcat is free. Of course, Tomcat is just a servlet container/web server, while the other two are complete JEE servers that have oodles of other features Tomcat doesn't.