nginx - A high performance free open source web server powering busiest sites on the Internet.
Google Cloud Load Balancing - Google Cloud Load Balancer enables users to scale their applications on Google Compute Engine.
Azure Traffic Manager - Microsoft Azure Traffic Manager allows you to control the distribution of user traffic for service endpoints in different datacenters.
Rackspace Load Balancers - Automatic and on-demand traffic management.
Netflix Eureka - Eureka is a REST-based AWS service registry for resilient mid-tier load balancing and failover.
Barracuda Load Balancer ADC - Barracuda Load Balancer offers secure application delivery & load balancing.