Liferay is freely downloadable from our web site at http://www.liferay.com. Click on the Downloads link at the top of the page, and you will be presented with multiple options for getting a copy of Liferay.
If you want to install a bundle, there is a list of bundles available on the first download page, with a recommended bundle at the top. If you do not currently have an application server, it is best to download the bundle that Liferay recommends at the top of the page. If you have an application server preference, you can also choose the server you prefer from the available Liferay Portal bundles. Having a JDK (Java Development Kit) already installed is a prerequisite to running any of the bundles.
Please note that Liferay is not able to provide application server bundles for proprietary application servers such as WebLogic, WebSphere, or Oracle Application Server because the licenses for these servers do not allow for redistribution. Liferay Portal, however, runs just as well on these application servers as it does on open source application servers; it just needs to be installed manually.
If you wish to obtain a copy of Liferay Portal for a manual install, you can click on the Additional Files link on the left side of the Downloads page. Here you will find Liferay .war files as well as links to Liferay's dependency .jars that need to be on your application server's class path. Later in this chapter are instructions for installing Liferay on many of the major application servers available today.