AWS Elastic Load Balancing - Amazon ELB automatically distributes incoming application traffic across multiple Amazon EC2 instances in the cloud.
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Haproxy - Reliable, High Performance TCP/HTTP Load Balancer
nginx - A high performance free open source web server powering busiest sites on the Internet.
KEMP Load Balancer - L4/7 Load Balancer w SSL offload
vCenter Server - IaaS platform for managing and deploying virtual machines