hMail Server - hMailServer is a free e-mail server for Microsoft Windows.
Google Calendar - Spend less time managing your day & more time enjoying it
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
Teamweek - A project management software to help you get the best overview. Plan fast, change plans faster!
Kontact - Kontact is the integrated Personal Information Manager of KDE.