ClientConfig gives your client a user-friendly interface for making site wide changes, while you as the administrator set up the different options available to the end-user. Settings are available with the familiar
[[++setting]] tag for super easy implementation, and settings are also available through the
$modx->getOption('key') APIs, allowing overriding of System Settings.
ClientConfig is maintained on Github, please file your bugs and feature request there. Pull requests are welcomed as well!
The first release was on December 9th, 2012 and is also available from MODX.com.