TTSync is a Mobile SyncML software that can synchronize data such as contact, calendar and task, etc. It is compatible with lots of SyncML Services in the World. Most SyncML clients build-in mobile phone has many parameters to set, for people who do not know SyncML very well it's a nightmare. but TTSync Client can be used easily. Just choose a provider, fill in user name and the password, press the "synchronize" button, and then TTSync client will synchronize all data for you.