Microsoft Outlook is a personal information manager from Microsoft.

Glip is fully searchable, real-time group chat; video chat, task management, file sharing app.

Yandex.Mail is a free email service.

Zoho Mail is a email service with ample storage, POP and IMAP access, some integration with instant messaging and online office suites.

Newton is a multi-platform email client which supports multiple email providers.

Kopano is an open-source groupware application suite originally based on Zarafa.

TypeApp is a mobile email client app.

Inbox by Gmail is a new app from the Gmail team. Inbox is an organized place to get things done and get back to what matters. Bundles keep emails organized.

K-9 Mail is an open source email client with support for multiple accounts, search, IMAP push email, multi-folder sync, flagging, filing, signatures.

Yahoo! Mail, a web-based email service, launched in 1997 through the American parent company Yahoo!. Yahoo! Mail provides four different email plans: three ar…

Inky is an email client for Microsoft Windows, macOS, iOS, and Android.

Open365 is an all-in-one productivity suite, based on KDE, Seafile, LibreOffice, Docker, and Jitsi.

ALTO Mail is a smart take on email that makes organizing real life easy.