Polymail - Native email app for email productivity.
VxStream Sandbox - Network & Admin
Morning Mail - A new way to manage your mail. Tinder for email.
URLscan.io - urlscan.io is a free service to scan and analyse websites. When a URL is submitted to urlscan.io, an automated process will browse to the URL like a regular user and record the activity that this page navigation creates.
Airmail - Airmail is a lightweight and lightning fast mail client for Mac.
CyberGordon - Aggregator of cyber reputation checks with more than 30 engines (threat intel sources)