Pgpool-II is a middleware that works between PostgreSQL servers and a PostgreSQL database client.
Pgpool-II saves connections to the PostgreSQL servers, and reuse them whenever a new connection with the same properties (i.e. username, database, protocol version) comes in. It reduces connection overhead, and improves system's overall throughput.
Advanced, production process manager for Node.JS
PM2 is a production process manager for Node.js applications with a built-in load balancer. It allows you to keep applications alive forever, to reload them without downtime and to facilitate common system admin tasks.
bare metal load-balancer for Kubernetes.
MetalLB is a load-balancer implementation for bare metal Kubernetes clusters, using standard routing protocols.