Mailspring - Mailspring is a mail client for Mac, Windows and Linux.

EventsApp - A simple concise app for creating and sharing events.

Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!

Event Hunt - Startups and Tech Events Curated By Locals

The Bat - The Bat! is a secure desktop email client for Windows, designed to protect your correspondence against third-parties and to save your time.

Calendify - Calendify is an event community where you can share, publish, and subscribe to event calendars. It helps you to stay informed about what you are interested in and what is yet to come.