Amazon EC2 - Amazon Web Services offers reliable, scalable, and inexpensive cloud computing services. Free to join, pay only for what you use.
DiscoverOrg - DiscoverOrg is an IT sales intelligence platform providing technology marketers access to data, IT org charts, and real time projects.
Microsoft Azure - Windows Azure and SQL Azure enable you to build, host and scale applications in Microsoft datacenters.
Clearbit - Clearbit provides Business Intelligence APIs
DigitalOcean - Simplifying cloud hosting. Deploy an SSD cloud server in 55 seconds.
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.