V2Ray - A platform for building proxies to bypass network restrictions.
KEMP Load Balancer - L4/7 Load Balancer w SSL offload
XX-Net - XX-Net is GoAgent with improvements.
AWS Elastic Load Balancing - Amazon ELB automatically distributes incoming application traffic across multiple Amazon EC2 instances in the cloud.
GoAgent - GoAgent is a gae proxy forked from gappproxy/wallproxy.
Microsoft Azure Traffic Manager - Microsoft Azure Traffic Manager is a great solution that enables you to route incoming traffic for high availability and performance.