BuiltWith - Find out the technology behind websites

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.

Lead Forensics - B2B website analytics and lead generation.

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.

FindThatLead Prospector - Feed your sales team with daily leads.

Sidekick by Hubspot - Customer insight integrated with your email tools.