We at CIGNEX developed a theme in Liferay Portal which could be used by many communities with different look and feel.   Which means you develop theme only once and use as different themes in various liferay portal sites.
 
We achieved this functionality by using a theme and by overriding the existing theme look and feel with the theme admin portlet.
 

We at CIGNEX developed online PDF Viewer Portlet using ICEFaces and ICEPdf frameworks. It is based on ICEPDF reference implementation.  This PDF Viewer portlet provides following features.

• It is integrated with liferay's document library. So if we add this portlet on any community/organization page. It allows us to browse pdf documents available in document library.

When you extend or customize Liferay Portal, usually you end up using the default Liferay database.
 
Some clients require that their data be stored in a database other than Liferay database when they customize the Portal application using Liferay.  This may be because their data is sensitive and they want additional security.  Some corporates such as Banking and Insurance have strict security policies and compliance in place to protect the data.
 

Background

Liferay is widely used open source portal with wide variety of features.  It manages content of various kind ex. Blogs , Wiki , User Information , Documents etc. In such case searching becomes one of the key aspect, by default liferay is bundled with lucene search indexer. From version 5.1.x liferay has made search engine pluggable and currently provides plugin integration with popular enterprise search engine Solr. In this blog I will share details about Solr ,  benefits of using solr in Liferay and solr-web (plugin to do integration between solr and liferay). 

 
Liferay Social Office is a social collaboration solution for the enterprise. From the start, the goal of Social Office was to allow people to collaborate effectively and efficiently. Beginning with the installation, and continuing on into the product itself, Social Office is very user friendly.  Current version is 1.5b. The version 2.0 will be ready at the end of Q4, 2009.