Listmonk - Send e-mail campaigns from a powerful dashboard. High performance and features packed into one app.

Vacation Tracker - The easiest way to track your team’s vacations and days off.

Sendy - Sendy is a self hosted newsletter app that sends emails 100x cheaper via Amazon SES

Punchtime - Nifty time tracking for Trello users and teams

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

Circlebatch - Circlebatch helps people working on side projects, open source, or startups find contributors to join them.