Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
GPGMail - GPGMail is an open source plugin for Apple Mail.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
ElectronMail - Unofficial desktop app for ProtonMail and Tutanota end-to-end encrypted email providers