gobetween - Modern & minimalistic load balancer for the Сloud era.
GitHub Load Balancer Director (GLB) - Set of components that provide a scalable set of stateless Layer 4 load balancer servers capable of line rate packet processing in bare metal datacenter environments, and is used in production to serve all traffic from GitHub's datacenters.
Seesaw - Linux Virtual Server (LVS) based load balancing platform.
Traefik Forward Auth - Minimal forward authentication service that provides OAuth/SSO login and authentication for the traefik reverse proxy/load balancer.
HAProxy - Reliable, High Performance TCP/HTTP Load Balancer. (Web)