Fabrik is the Joomla application builder
Check out the files into your Joomla installations root directory. Log into your Joomla administration control panel Go to Extensions->Extension manager Press the discover link Press 'purge cache' and then 'Discover' Select the Fabrik package and press install.
Please check that the installed plugins are published before using fabrik.
Once you have installed Fabrik 3, overwriting the fabrik files in your Joomla installation with those downloaded from github should be sufficient.
For more information please visit: http:/fabrikar.com