Fluentd - Fluentd is a cross platform open source data collection solution originally developed at Treasure Data.
Timber.io - Timber.io is the best logging platform for ruby, node, elixir and much more.
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
SignaleJS - Highly configurable logging utility for NodeJS 👋
Splunk - Splunk's operational intelligence platform helps unearth intelligent insights from machine data.
AWS CloudTrail - AWS CloudTrail is a web service that records AWS API calls for your account and delivers log files to you.