Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
Onionshare - OnionShare lets you securely and anonymously share a file of any size with someone.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
ShareDrop - HTML5 clone of Apple's AirDrop - easy P2P file transfer powered by WebRTC
FairEmail - Open source, privacy friendly email app
Send Anywhere - Send whatever you want, wherever you want