My module is pretty simple, it just has a admin form with a textbox to fill sites into, then hook_crons to loop over each site curling them in the process.
Future of this module: look in the sites dir and prepopulate the list, offer other ways other then curl to call cron.php of each site.
It does require that cron on the site running Multicron to be setup either via crontab or perhaps poormanscron. It should support running cron on D7 sites from a D6 site.
Please let me know if you need more info.
Fixed
new project application
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