WSO2 ELB supports IaaS integration using jclouds APIs. Theoretically this means we can support any IaaS that is supported by jclouds. Currently we provide support for AWS EC2 and Openstack-nova IaaS providers. Please read more info on autoscaling using WSO2 ELB from here.
Download our latest release (WSO2 ELB 2.0.3) from our product page.