LeadFuze - B2B Lead Generation & Sales Prospecting Software.
DiscoverOrg - DiscoverOrg is an IT sales intelligence platform providing technology marketers access to data, IT org charts, and real time projects.
Hunter - Find all the email addresses related to a domain
Clearbit - Clearbit provides Business Intelligence APIs
Workbooks - Workbooks is a suite of web-based CRM and business applications built for SMBs.
LinkedIn Sales Navigator - Sales tool for LinkedIn users.