Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.
Lookback - See how people really use your app
Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES
Dovetail - Mobile Cloud-Based Dental Software
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
Face++ - API for face detection – also detects gender, age, pose