WordPress is the Number 1 CMS (Content Management System) that is free and can be installed on your own webserver platform. It can be extended and modified into limitless possibilities without licensing issues. WordPress powered more than 60% of the top websites on the world wide web.
It can be configured and online in about 20 minutes!
Some of the positive features of WordPress:
Ease of Publishing
Search Engine Friendly right out of the box
Flexibility with an endless supply of Plugins
Super Easy installation and Upgrades
Thousands of free and premium themes to choose from
Built-in Comments System
Multilingual support - comes in 70 languages
Fantastic Media Management
One of the largest Support Communities online
Nice application platform for application interfacing