In its 10th year of development, Liferay Portal is today's most popular and widely downloaded open source portal.
An enterprise portal, also known as an enterprise information portal (EIP) or corporate portal, is a framework for integrating information, people and processes across organizational boundaries. It provides a secure unified access point and is designed to aggregate and personalize information through application-specific portlets.
Liferay includes all the standard portal features such as Single Sign-On, Integration, Federation, Customization, Personalization, Access Control and Enterprise Search. In addition, Liferay have extensive support for knowledge sharing, collaboration, social networking and web content management.
Liferay is implemented around open standards and runs on all major app servers, databases and operating systems.