Google have open-sourced their auto-update mechanism to a project called 'Omaha'. But it's so complicated an google-specific that nobody else seems to use it:

Google have open-sourced their auto-update mechanism to a project called 'Omaha'. But it's so complicated an google-specific that nobody else seems to use it: http://stackoverflow.com/questions/3711435/has-anybody-used-google-omaha-their-auto-update-engine-for-chrome http://stackoverflow.com/questions/3711435/has-anybody-used-...