salesforce.com

this is a force.com development platform. this provides a simple user interface and lets users log in, build an app, and push it in the cloud.

appistry

the appistry's cloudiq platform is efficient in delivering a runtime application. this platform is very useful to create scalable and service oriented applications.

appscale

the appscale is an open source platform for app engine of google applications.

at&t

the at&t allows access to virtual servers and manages the virtualization infrastructure. this virtualization infrastructure includes network, server and storage.

engine yard

the engine yard is a rails application on cloud computing platform.

enomaly

enomaly provides the infrastructure-as-a-service platform.

flexiscale

the flexiscale offers a cloud computing platform that allows flexible, scalable and automated cloud infrastructure.

gcloud3

the gcloud3 offers private cloud solution in its platform.

gizmox

the gizmox visual webgui platform is best suited for developing new web apps and modernize the legacy apps based on asp.net, dhtml, etc.

gogrid

the gogrid platform allows the users to deploy web and database cloud services.

google

the google's app engine lets the users build, run and maintain their applications on google infrastructure.

longjump

the longjump offers a business application platform, a platform-as-a-service (paas).

microsoft

the microsoft windows azure is a cloud computing platform offering an environment to create cloud apps and services.

orangescape

orangescape offers a platform-as-a-service (paas) for non-programmers. building an app is as easy as spreadsheet.

rackspace

the rackspace provides servers-on-demand via a cloud-driven platform of virtualized servers.

amazon ec2

the amazon ec2 (elastic compute cloud) lets the users configure and control computing resources while running them on amazon environment.