World Time Buddy - Effortless time conversion and world time.
Cronhub - Cronhub helps you to easily monitor all your cron jobs in a beautiful dashboard. It alerts you when your cron job doesn't run on time or it fails.
Time.is - exact time in any location
timeanddate.com - Free Clock for your website or blog!
Cronitor - Monitor cron jobs, micro-services, daemons and almost anything else, no setup required. Easier cron troubleshooting and no more silent failures.
Chronozone - The easy way to check times throughout the world.