Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.

Google Calendar - Spend less time managing your day & more time enjoying it

SA Contacts Lite - SA Contacts Lite app comes up with features to help you in transferring all your contacts in your phone book between all your handheld devices without much of a stretch.

Simple Calendar - A simple calendar with events (optional recurring and reminders), week numbers and a customizable...

Kontact - Kontact is the integrated Personal Information Manager of KDE.

Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.