• Amazon Web Services (IaaS), market leader and inventor of Cloud Computing concept. Main offerings are:
  
  • EC2: Elastic Compute Cloud, to start/stop any number of Linux or Windows virtual machines, within a few minutes, in Dublin, Virginia, California, Singapore and Tokyo, to consume computing resources on demand, paying by the hour, with no up-front investment
  • EBS: Elastic Block Storage, to create and attach volumes of any size on these VMs (from a few GB to several TB or even PB)
  • CloudWatch: EC2 instance monitoring (% CPU, % RAM used etc.)
  • SimpleDB: scalable and schema-less database in the Cloud
  • S3: Simple Storage Service, scalable and REST-accessible storage (no need to go through EC2)
  • CloudFront: CDN (Content Delivery Network), geographical data replication close to Web clients for a better, faster user experience
  • SQS: Simple Queue Service, applicative queue messaging, for reliable application communication, with error recovery
  • RDS: Relational Database Service, scalable MySQL database in the Cloud (with schema)
  • VPC: Virtual Private Cloud, IPSec VPN bridge between existing IS and EC2 machines in the Cloud


• GoGrid (IaaS) :
  • Cloud Hosting: to start/stop any number of Linux or Windows virtual machines, within a few minutes, in California, to consume computing resources on demand, paying by the hour, with no up-front investment
  • Cloud Storage: to create and attach volumes of any size on these VMs (from a few GB to several TB or even PB)
  • GoGrid CDN : Content Delivery Network, geographical data replication close to Web clients for a better, faster user experience


• Rackspace, Flexiscale : IaaS AWS and GoGrid competitors


• Microsoft Azure (PaaS)
  • Azure Compute: ASP.NET applications and .NET/native batches hosting
  • Azure Storage: scalable blob storage in the Cloud, directly accessible through REST
  • SQL Azure: relational database (SQL Server) in the Cloud
  • Service Bus: ESB in the Cloud
  • Access Control: identity federation for SSO in the Cloud


• Google AppEngine (PaaS)
  • Cloud Hosting: scalable Python/Java application hosting, with storage and BigTable flat database


• force.com (PaaS)
  • CRM oriented (SalesForce) scalable application hosting


• salesforce.com (SaaS)
  • Consume Web CRM software on demand


• Google Apps (SaaS)
  • Profesional version of Gmail and Google Apps: online office applications, consumed on-demand

Map 2008 of Cloud actors (click to maximize) :