CakePHP-ErrorStack is a project mainly written in PHP, it's free.
CakePHP plugin that sends errors to ErrorStack.com
ErrorStack: http://www.errorstack.com/
To install do this: git submodule add git://github.com/webjay/CakePHP-ErrorStack.git plugins/errorstack
In app/config/bootstrap.php insert: CakeLog::config('Errorstack', array( 'engine' => 'Errorstack.Postlog', 'key' => 'your key' ));