Google Calendar, Postbox, Airmail, Mutt, Yahoo Mail, IncrediMail, Geary, Foxmail, Superhuman, Fossify Calendar, Calendar Buddy, Microsoft Outlook Express, WunderMail, MailMate, Betterbird, nPOPuk, Canary Mail, Nextcloud Mail, Simple Calendar, Pegasus Mail, Calypso, Orbit Communicator, Polymail, Sylpheed, GNOME Calendar, Zimbra Desktop, SlideMail, Simple Mail, aerc, Pantheon Mail, EmailTray, DreamMail, Ymail2, Inbox2, GyazMail, Postler, Alternative Fuse, AutoSnoozer, LeaderSend, Mailsmith, Spicebird, InboxZero, Mulberry, Mail Pilot, AnCal, Email.biz, Mailburn, Smampi, Calendarscope, Visual Calendar for Tablets are some alternatives to Microsoft Mail and Calendar.