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.

Outlook Google Calendar Sync - Offers calendar synchronisation between Outlook and Google, including attendees and reminders.

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.

AkrutoSync - Sync your Outlook contacts, calendar, tasks and notes on your PC direct with your phone via Wi-Fi or a cellular network.‎Buy · ‎FAQ · ‎Contact Us · ‎SupportPeople also askWhat is Akrutosync?

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

DAVx5 - DAVx5 is a CalDAV/CardDAV management and sync app for Android.