Roundcube - Web-based IMAP email client
Operator - Looking for something? Make a request and we'll find it.
HEY - Email at its best, new from Basecamp.
Magic - Get whatever you want on demand with no hassle, through SMS
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.
Slack - A messaging app for teams who see through the Earth!