What are some alternatives?
When comparing XenoNode and CoreCluster, you can also consider the following products
Hetzner - Server hosting provider.
OpenStack - OpenStack software controls large pools of compute, storage, and networking resources throughout a datacenter, managed through a dashboard or via the OpenStack API.
BHost - BHost is the provider of VPS hosting with unmetered bandwidth.
SolVPS - SolVPS deliver the on-demand cloud hosting solutions including premium VPS hosting and cloud web hosting for the small business.
CloudVPS - VPS Hosting in a reliable, scalable and fast cloud | CloudVPS
RamNode - High Performance SSD and SSD-Cached VPSs