pgcli - Postgres CLI with autocompletion and syntax highlighting
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
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.
Prometheus - An open-source systems monitoring and alerting toolkit.
Skor - Application and Data, Data Stores, and Database Tools