Watchdog
system tools
Current version: 5.16~ynh1
Potential alternative to: SwitchingItOffAndOnAgain
A watchdog service makes sure your server is still running and reboots it if necessary. It better (only?) works if your server has a hardware watchdog device.
The included sercice will regularly write to /dev/watchdog. If it stops, then the freeze is detected and server rebooted.
This app has only been tested on Raspberry Pi.