iNetFusion - use multiple internets at once
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.
Microsoft Azure Traffic Manager - Microsoft Azure Traffic Manager is a great solution that enables you to route incoming traffic for high availability and performance.
KEMP Load Balancer - L4/7 Load Balancer w SSL offload
ScaleArc - ScaleArc offers database performance monitoring software for SQL server, MySQL & Oracle. Ensure zero downtime & database scalability with no app changes.