ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
Team Time Zone - Local clocks for distributed teams who use Slack
Enigmail - Security extension to Mozilla Thunderbird and SeaMonkey
Timezone.io - Keep track where and when your team is.
Mailvelope - Mailvelope open source project. OpenPGP in your browser.
Every Time Zone - Online tool for keeping up with times around the world.