For the past three years, Earth Hour has used a free community license of Confluence to galvanize people, cities and countries to turn off their lights for one hour in support of saving our planet from the effects of global warming.
From Earth Hour:

On March 28th, 2009 at 8:30pm local time, over a billion people will be switching off their lights as part of a global vote. Unlike any election in history, it is not about what country you’re from, but instead, what planet you’re from. VOTE EARTH is a global call to action for every individual, every business, and every community. A call to stand up and take control over the future of our planet. Over 74 countries and territories have pledged their support to VOTE EARTH during Earth Hour 2009, and this number is growing everyday.

In preparation for Earth Hour 2009, several Atlassians with the help of the Atlassian Foundation took an active role in helping Earth Hour revamp their wiki.
Next week, Atlassian technical writer, Andrew Lui, will be blogging in more detail about how we became involved with Earth Hour along with the changes and improvements Atlassian made to Earth Hour’s wiki.
In the meantime, if you’d like to support Earth Hour, spread the word! Visit Earth Hour’s ‘Take Action’ website to see what you can do in your community and download this nifty wallpaper to display on twitter or your desktop. Simply click the image to open into a new browser window and drag it onto your desktop.

Since 2002, Atlassian and the Atlassian foundation have donated over $12,000,000 in licenses to non profit and open source movements. If you’re interested in learning more, or applying for a free license, visit this page

Support Earth Hour and Turn Off The Lights!