Clearbit - Clearbit provides Business Intelligence APIs
Callpage - Turn website visitors into sales calls. Use CallPage and provide immediate free phone callback to your leads in 28 seconds.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
Kit CRM - A CRM for your Facebook page
InsideView - InsideView aggregates and curates all the company and contact data, news and social insights, and professional connections you need to do business better.
Closer - Digitize your sales team | Video calls for sales