fcron - Fcron is a scheduler designed for Unix/Linux systems, especially usefull when your system is not up all the day long.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
incron - This program is an "inotify cron" system. It consists of a daemon and a table manipulator.
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.
mcron - mcron is GNU's implementation of cron. It is a 100% compatible replacement for Vixie cron.
Microsoft Power Automate - Microsoft Power Automate is an automation platform that integrates DPA, RPA, and process mining. It lets you automate your organization at scale using low-code and AI.