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.
Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
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.
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES
Sidekick by Hubspot - Customer insight integrated with your email tools.
Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates