The world's leading open source portal
Liferay Portal is the world's leading enterprise open source portal framework, offering integrated Web publishing and content management, an enterprise service bus and service-oriented architecture, and compatibility with all major IT infrastructure.
MyServer development has moved to GNU savannah since it became an official GNU Project: https://savannah.gnu.org/projects/myserver
C# Website system. This is going to be the "Newer" Internet, and even has a custom theme system. This is going to let users do "anything" that won't harm the client computer in any way.