Haproxy - Reliable, High Performance TCP/HTTP Load Balancer
AWS Elastic Load Balancing - Amazon ELB automatically distributes incoming application traffic across multiple Amazon EC2 instances in the cloud.
iNetFusion - use multiple internets at once
Ericom Connect - Ericom Connect
nginx - A high performance free open source web server powering busiest sites on the Internet.
ScaleArc - ScaleArc offers database performance monitoring software for SQL server, MySQL & Oracle. Ensure zero downtime & database scalability with no app changes.