This is a great list. Thanks for creating it. There's no mention of PagerDuty in the Alerts / Monitoring section. There's also nothing in the way of DevOps too

This is a great list. Thanks for creating it. There's no mention of PagerDuty in the Alerts / Monitoring section. There's also nothing in the way of DevOps tools a la Puppet / Chef, and metrics tools such as Graphite.