Milan Dinić

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This plugin enables using WordPress as a cron system that would hit external URLs (ie. any URL) on a scheduled basis. User can submit URL and interval in which that URL should be opened by WordPress.
This can be used, for example, for other WordPress sites that are on hosts that don’t have native cron system or where it’s complicated to set it up. For that cases, URL should be in format <code>http://example.com/wp-cron.php</code> and there should be constant <code>DISABLE_WP_CRON</code> in <code>wp-config.php</code> file to avoid running WordPress own pseudo cron: 
 define(‘DISABLE_WP_CRON’, true);
It’s recommended to setup a real cron for the site where this plugin is installed, with interval that is the lowest one from settings. Follow WordPress specific advises from above, and check links from <a href="http://blog.milandinic.com/wordpress/plugins/run-external-crons/" rel="nofollow ugc">plugin’s page</a> on how to set up this.
If you are translator, you can translate this plugin to your language and send translations to plugin’s author.

Run External Crons

Use WordPress internal cron system to hit external URLs on a scheduled basis.

fastcron

This plugin will set up a free cronjob to run your <code>wp-cron.php</code> file automatically. Completely free, no registration required. 
It relies on the free cronjob service provided by <a href="https://www.fastcron.com/?ref=wp" rel="nofollow ugc">FastCron</a>.
Upon activation, it will send your site URL to FastCron, and they will create and run a cronjob every 5 minutes to visit your <code>wp-cron.php</code> file via this URL: 
 https://site-url/wp-cron.php?doing_wp_cron=1
Features: 
– Completely free, no registration required. 
– Simple and fast, just click activate and done. 
– View last 25 execution results on FastCron.
This free plugin is suitable for your personal blog.
If you manage several WordPress blogs/websites for your clients, please <a href="https://app.fastcron.com/signup?ref=wp" rel="nofollow ugc">register an account at FastCron</a> and set up your cronjobs there.
Upon deactivation, the plugin will request FastCron to remove the cronjob to your <code>wp-cron.php</code> file.
By using this plugin, you agree to their <a href="https://www.fastcron.com/about/terms?ref=wp" rel="nofollow ugc">Terms of service</a> and <a href="https://www.fastcron.com/about/privacy?ref=wp" rel="nofollow ugc">Privacy policy</a>.

FastCron – Run WP Cron for free

This plugin will set up a free cronjob at FastCron to run your wp-cron.php file automatically. Completely free, no registration required.

Run External Crons vs FastCron – Run WP Cron for free