List of various HOWTO’s created by community members.
Probes / Monitoring:
Main probe topic with many examples: http://forum.mikrotik.com/t/probe-thread/10321/1
Voltage monitoring on The Dude for v6+ : http://forum.mikrotik.com/t/howto-voltage-monitoring-on-the-dude-for-v6/108832/1
Monitoring Emerson Liebert cooling system: https://forum.mikrotik.com/viewtopic.php?f=8&t=123569
Notifications:
Notification via Telegram - http://forum.mikrotik.com/t/dude-telegram-notification-example/104998/1
Notification via Mattermost/Slack - http://forum.mikrotik.com/t/thedude-notification-slack-com/107580/11
SMS notification through SMS gateway - using fetch tool - http://forum.mikrotik.com/t/dude-v6-sms-notifications-through-sms-gateway-using-fetch-tool/108845/1
SMS notification through smspilot.ru - using fetch tool - http://forum.mikrotik.com/t/dude-v6-sms-notifications-through-smspilot-ru-using-fetch-tool/108828/1
SMS notification trough USB modem on ROS - using sms tool - http://forum.mikrotik.com/t/dude-v6-sms-notifications-trough-usb-modem-on-ros-using-sms-tool/108824/1
Email notification through Gmail - http://forum.mikrotik.com/t/dude-v6-email-notification-through-gmail/109895/1
Email notification through Gmail on Windows - via mailsend - http://forum.mikrotik.com/t/dude-email-notifications-through-gmail-on-windows-via-mailsend/77346/1
Various:
Backup local: https://forum.mikrotik.com/viewtopic.php?f=8&t=123616
Backup to FTP: https://forum.mikrotik.com/viewtopic.php?f=8&t=127509
Specify custom Winbox port for ROS device in Dude: https://forum.mikrotik.com/viewtopic.php?f=8&t=129225
The Dude manual:
https://wiki.mikrotik.com/wiki/Manual:The_Dude
Hardware to run Dude: https://forum.mikrotik.com/viewtopic.php?t=184981
PS, list will be as new articles appear and if I have missed some, just comment on topic in reply.