Just list :)
| Engine | License |
| BEA Weblogic | Commercial |
| Blazix Java Server | Commercial |
| IBM Websphere | Commercial |
| JBoss | LGPL, Open Source |
| Jetty | Open Source |
| JRUN | Commercial |
| LiteWebServer | BSD-style Open Source |
| NGASI | N/A |
| Orion | Commercial |
| Resin | Commercial, Open Source |
| Servlet Exec | Commercial |
| SUN One Application Server | Commercial |
| TOMCAT | Apache Software Licence, Open Source |