nginx - A high performance free open source web server powering busiest sites on the Internet.
StresStimulus - Load testing tool for websites and mobile that works with hard-to-test applications.
AWS Elastic Load Balancing - Amazon ELB automatically distributes incoming application traffic across multiple Amazon EC2 instances in the cloud.
OctoPerf - OctoPerf is a SaaS load testing solution, based on JMeter.
Google Cloud Load Balancing - Google Cloud Load Balancer enables users to scale their applications on Google Compute Engine.
SmartMeter.io - Performance Testing with Enterprise-Level Features with a familiar jMeter interface