Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!
PersistIQ - It takes multiple touch points before a lead engages. PersistIQ automates the tedious parts while preserving the key human elements of sales
LinkedIn Premium - LinkedIn is a social network helping brands and professionals to connect, identify sales prospects, hire talent, and promote their business.
Skrapp.io - Skrapp.io is the easiest solution to extract leads from Linkedin. In few seconds, you can find email addresses and launch your email prospecting project.
Salesforce Chatter - Salesforce Chatter provides a suite of collaboration features to any application built on Force.com.
Clearbit - Clearbit provides Business Intelligence APIs