6sense - 6sense is a B2B predictive intelligence engine for marketing and sales.
InsightSquared - #1 for Salesforce.com Pipeline forecasting, profitability analysis, activity tracking: all the small business intelligence you need. Works using CRM data and automatic syncing.
Leadiro - Seriously Smart & Live B2B Data
Aviso - Aviso provides predictive analytics software to help sales organizations optimize their performance and exceed revenue goals using machine learning algorithms and portfolio management techniques.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
Sidekick by Hubspot - Customer insight integrated with your email tools.