Version 0.9.1 of Habari is now available (April 4, 2013).
A snapshot of the current development version is available for download.
Beware: Using the development snapshot may cause breakage on your site. If dealing with in-development glitches is not your cup of tea, try the latest stable download, above.
You can test whether your server is compatible with the development snapshot of Habari by uploading the requirements.php file to your host and viewing it through your browser. This file will show you what needs to be changed on your server to enable Habari, if required.
The Habari git repository is located here:
Learn more about Habari on Github and the advantage of running Habari directly from the source control system.