WiSync - Automatically enable and disable synchronization based on your WIFI connection status. WiSync can save money for those without unlimited data plans, out of the country, or when simply data roaming. WiSync does not interfere with independent synchronization efforts and can be easily disabled
ContactSync is a workaround for an issue found on some Android devices: the impossibility of Google-synchronized contacts creation. It makes all the contacts synchronized with Google.
Runs only on Android Cupcake/1.5, and can fix only the devices that have the specific contact database structure leading to this issue