Apache Libcloud is an open-source client library that abstracts away differences among multiple cloud provider APIs, exposing common functionality in a nice, clean and concise API. The current version allows users to manage four different cloud resources: Cloud Servers (services such as Amazon EC2 and Rackspace), Cloud Storage, Load Balancers …
As OpenStack is supposed to be the universal cloud platform of the future, this article discusses the current status of its foundation and its strong relationship with Rackspace.
What will it cost to run your Virtual Machines in the Cloud? The Solarwinds VM to Cloud Calculator does an inventory of your server, then provides a detailed report at what your VMs would cost to run on Amazon EC2, Windows Azure, and Rackspace Cloud servers.
Bitcurrent and Webmetrics have run a number of tests for a month on 5 different cloud platforms – Amazon, Google, Rackspace, Salesforce.com, and Terremark -, attempting to measure the performance of each platform. One of their conclusions is that each platform works better for different application types. http://www.infoq.com/news/2010/07/Benchmarking-5-Cloud-Platforms