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.
Doxygen - Generate documentation from source code
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.
Docsify.js - A magical documentation site generator.
Sidekick by Hubspot - Customer insight integrated with your email tools.
GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.