Portal Solutions
Liferay

Liferay Portal is a free and open source enterprise portal written in Java and distributed under the GNU Lesser General Public License.[1] It is primarily used to power corporate intranets and extranets.
Liferay Portal allows users to set up features common to websites. It is fundamentally constructed of functional units called portlets.Liferay is sometimes described as a content management framework or a web application framework. Liferay's support for plugins extends into multiple programming languages, including support for PHP and Ruby portlets.

 
Sharepoint

Microsoft SharePoint is a family of software products developed by Microsoft for collaboration, file sharing and Web publishing.
This family of products includes: Microsoft SharePoint Server,Microsoft SharePoint Foundation, Microsoft Search Server, Microsoft SharePoint Designer and Microsoft SharePoint Workspace.
Microsoft Sharepoint is a Web technology based server that can be used to build portals, collaboration sites, and also content management sites. It is very versatile in a number of features and support various enterprise and Web scenarios. It is also popular for document management solutions.

 
IBM Portal

IBM WebSphere Portal is a set of software tools that enables companies to build and manage web portals.
The WebSphere Portal package is a component of WebSphere software. Like WebSphere, the WebSphere Portal package is developed and marketed by IBM. Available since 2001, it is now sold in five editions.

 
Drupal

Drupal is a free and open source content management system (CMS) and Content Management framework (CMF) written in PHP and distributed under the GNU General Public License.It is used as a back-end system for at least 1.5% of all websites worldwide ranging from personal blogs to corporate, political, and government sites including whitehouse.gov and data.gov.uk.It is also used for knowledge management and business collaboration.