Sidekick by Hubspot - Customer insight integrated with your email tools.
Cloze - Smarter Relationship Management
Sansan - Sansan provides a internal contact sharing service for companies.
Accompany - Accompany platform integrates with email, contacts, social feeds and more to keep you informed on your professional connections.
HiHello - Exchange contacts, seamlessly.
SuiteFlow - SuiteFlow is a product to customer management solution offering a host of tools to manage inventory, contacts, invoices etc.