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.
Drift - A messaging app that helps you grow your business.
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.
Dooly - Sales Enablement
Sidekick by Hubspot - Customer insight integrated with your email tools.
Veloxy Mobile - Focus on your most productive sales activities, and take all the grunt-work out of Salesforce updates. You can recover three house per week extra sales time