AWS Elastic Load Balancing - Amazon ELB automatically distributes incoming application traffic across multiple Amazon EC2 instances in the cloud.
KEMP Load Balancer - L4/7 Load Balancer w SSL offload
Ericom Connect - Ericom Connect
Haproxy - Reliable, High Performance TCP/HTTP Load Balancer
nginx - A high performance free open source web server powering busiest sites on the Internet.
iNetFusion - use multiple internets at once