BlueMail - BlueMail is an email management app for Android, iOS, and Windows.
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.
Junk Email Filter - Junk Email Filter is a front end spam filtering and virus blocking service for email servers.
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.
Covideo - Covideo is a Video Email Platform for Businesses that enables companies to communicate quickly and effectively with their customers.
Sidekick by Hubspot - Customer insight integrated with your email tools.