Cloud Computing and the major players

Google

• Google App Engine -empower developer to build web-apps on cloud infrastructure
• Google Web Toolkit - a PaaS, tools based on Java with AJAX support for development & debugging

Amazon

• EC2 - Elastic Compute Cloud is a web service that offer elasticity capcity in cloud.
• SimpleDB
• S3 - Simple Storage Service is Amazon's cloud storage solutions
• CloudFront - webservice for content delivery on cloud.
• SQS- Amazon'z Simple Queue Service is a cloud messaging system
• EBS - Elastic Block store is Amazon's persistent storage

Microsoft

• Azure Service Platform ( cloud services platform hosted by microsoft)
• Exchange Online
• Sharepoint services
• Microsoft Dynamic CRM

Saleforce.com

• Force.com - on demand PaaS 
• Visualforce - tool fordesigning  business apps
• AppExchange - directories of apps for salesforce.com by 3rd party.
• Salesforce.com CRM

EMC

• VMware 
• Symmetric V-max system - Management system to manger virtual datacenters
• Storage leader

NetApp

• Cloud Storage & data management solutions
• Unified storage architecture (Joint with Cisco)

Cisco

• Unified Computing System

IBM

• IBM Global Business Services
• X-Force

SAP-IBM

• Partnership with IBM on project RESERVOIR(REsource and SERvices Virtualisation withOut barrIeRs)

Yahoo

• Yahoo! Research & CRL(Computational research laboratories)

HP-Intel-Yahoo!

• creating a global multidatacenter, opensource test bed for cloud computing research.
• partnership with Singapore's IDA, Universitiy of Illinois & Karlsruhe Inst of Technology(Germany)