Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.
DiscoverOrg - DiscoverOrg is an IT sales intelligence platform providing technology marketers access to data, IT org charts, and real time projects.
HEY - Email at its best, new from Basecamp.
Clearbit - Clearbit provides Business Intelligence APIs
Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Datanyze - The sales prospecting tool powered by technology data