Get a powerful and easy-to-use SNTP client with various features.
Edit by : Yellowbill is a free program provided to anyone who is looking for a powerful but easy to use SNTP client for Windows. Although designed for use with Airchitex Cuckoo?, YellowBill will work with any NTP or SNTP server.

Basic features:
Regularly sychronizes PC clock at rate you specify
Immediately shows status of time Server in system tray
Able to log NTP packet information
Gather statistics on time server operation
Automatic detection of local time server
Ability to generate test packets and see individual fields
Monitor servers and run an external program if they lose GPS, shutdown, startup, etc.
SNTP client only (see note below)

YellowBill is an SNTP client, not an NTP client. Although the protocols are identical, and YellowBill will also operate with an NTP server, there are important differences of which you should be aware.

YellowBill does not consult multiple servers to get time, but just a single server. This means that it assumes that the first server it contacts will have an accurate time. It cannot average out differences in time offsets like an NTP client can. Although YellowBill provides the ability to set more than one server, these secondary servers are consulted for statistical or logging purposes only, not in the computation of system time. For a single local SNTP server like Cuckoo, this is not a problem because there will be low and controllable network latencies. However, if you are using YellowBill to set your time using an Internet NTP server, you may not achieve the desired system time stability or resolution.
you can free download Yellowbill 1.03 now.