AWS Elastic Load Balancing - Amazon ELB automatically distributes incoming application traffic across multiple Amazon EC2 instances in the cloud.
Surge for Mac - Advanced Web Debugging Proxy for Mac & iOS
KEMP Load Balancer - L4/7 Load Balancer w SSL offload
Weer - A HTTP protocol debugger with Chrome DevTools frontend interface
SKUDONET - Scale easy and avoid system disruptions with the ADC challengers through high availability, load balancing, security and high performance.
Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy