Elastic ingest pipelines
Open Guide to AWS
Logstash, but in Rust
Mingrammer diagrams as code
Open Policy Agent is pretty darn cool, if you like Rego (derived from datalog, from Prolog).
Learn AWS quick
Benthos - I am always looking for better tools for processing streaming events. Logstash is powerful and flexible, but it's also a complete dog for performance. Also have my eye on Apache Storm, Flink, Wallaroo, and Mozilla Heka.
Smallstep - Private x.509 certificate authority
NSQ - Realtime distributed messaging
SSH Agent Explained
SaaS Operations Management - https://www.g2.com/categories/saas-operations-management