Portal
Metadot Portal Server is a point-and-click website builder software for building powerful websites just with the click of a mouse.
More Info 
Developer: Daniel Guermeur
License: GNU General Public License (GPL)
Operating System: Windows NT/2000, FreeBSD, Linux
MemHT Portal is a Free Multilingual Content Management System.
Developer: Miltenovik Manojlo
License: GNU General Public License (GPL)
Operating System: ALL
LSP: Enigma is an easy to use portal package for your website.
Developer: Lunabyte Systems Portal
License: GNU General Public License (GPL)
Operating System: OS Independent (Written in an interpreted language)
iPortal is a complete ready-to-run Web portal system (portal).
Developer: Drew Gauderman
License: GNU General Public License (GPL)
Operating System: Windows
Portal system with membership features like forums, profiles, and messaging along with links, downloads, polls, and a number of other features.
Developer: Jos Brown
License: GNU General Public License (GPL)
Operating System: Unix, Linux, Win
Pre Podcast Portal is highly effective script, developed in php to provide complete solution for podcasting.
Developer: PreProjects.com
License: GNU General Public License (GPL)
Operating System: All
iJoomla News Portal turns your existing sections, categories and articles into a live news portal.
Developer: Merav Knafo
License: GNU General Public License (GPL)
Operating System: Not Available
i Net Video Community portal is the ultimate solution for starting your video sharing and uploading community just like the big boys such as Youtube, Daily Motion and Myspace Videos.
Developer: Birundha
License: GNU General Public License (GPL)
Operating System: Linux, Windows & UNIX
MaxWebPortal is a web portal and online community system which includes advanced features such as web-based administration, poll, private/public events calendar, user customizable color themes, classifieds, user control panel, online pager, link, file, article, picture manager and etc.
Developer: http://www.maxwebportal....
License: Freeware
Operating System: windows
Eazy portal is the best solution allowing you to maintain your online community.
Developer: Vladimir
License: Freeware
Operating System: Linux
Liferay Enterprise Portal is a Java/J2EE portal system that provides personalization (like Yahoo.
Developer: Liferay Developers
License: MIT/X Consortium License
Operating System: UNIX, Win NT, XP, Linux
YaWPS (Yet another Web Portal System) is a hybrid between a content management system and a web portal for medium- or small-sized Internet- or Intranetsites.
Developer: Adrian Heissler
License: GNU General Public License (GPL)
Operating System: UNIX platforms as well as on Windows platforms.
PHP Nuke is the most popular Web Portal Software.
Developer: Kurt
License: GNU General Public License (GPL)
Operating System: Windows, Linux,
MaxWebPortal is a web portal and online community system which includes advanced features such as web-based administration, poll, private/public events calendar, user customizable color themes, classifieds, user control panel, online pager, link, file, article, picture managers and much more.
Developer: http://www.maxwebportal....
License: Freeware
Operating System: Win 95/98/ME/2000/XP, Access 97/2000, SQL
AWF is a modern Open Source Content Management System and development framework based on PHP 5 and the Smarty template engine.
Developer: AWF-CMS.org
License: GNU General Public License (GPL)
Operating System: UNIX compatible OS (like Linux, BSD, Solaris or OS X) and Apache HTTP server for production environments. Windows is experimental, but seems to work quite well.
Collaborative Portal Server (CPS) is the most complete Open Source platform available for building Enterprise Content Management (ECM) applications.
Developer: CPS
License: GNU General Public License (GPL)
Operating System: Linux/Unix/MacOS/Windows
GuppY, the easy, free and databaseless web portal, will allow you to generate very easily a complete and interactive web site.
Developer: The FreeGuppY.org
License: GNU General Public License (GPL)
Operating System: All
i-Net B2B Portal Script provides everything you need, to establish a professionally looking online B2B website like Alibaba.
Developer: vs jayan
License: GNU General Public License (GPL)
Operating System: Not Available
Customizable, user friendly open source social networking portal software with features like blog, forum, chat, gift shop,job poratl,point system etc.
Developer: iScripts
License: Open Software License
Operating System: Linux,Windows
Simply setup, easy to manage everyday content.
Developer: Nath
License: Freeware
Operating System: Windows