NetTime

NetTime is a simple-to-use, free and open-source time synchronization client that supplies you with a server and client for RFC868 and SNTP.

It's capable of synchronizing to a list of custom and predefined servers, in order to change your system's clock to them. If it connects to multiple servers, the app calculates the average time between all to be as accurately as possible.

The setup procedure is speedy and uncomplicated. The only notable aspect about it is that you can install NetTime as a Windows service (this can be later enabled too).

Once launched, the utility creates an icon in the taskbar notifications area and sits there when it's not in use, so it doesn't interrupt your regular PC activities.

You can either leave the predefined time servers unchanged, edit their properties, or add new ones by indicating the host name or IP address, protocol (SNTP, RFC868 TCP or RFC868 UDP), and port number.

In the main window you can check out the name, status, offset, lag time and last recorded error of each server, in addition to the current system date and time, last attempt and sync, next attempt, along with the program status and mode (standalone app or server).

NetTime lets you modify the default update frequency and retry interval, and you can also manually update time with one click. What's more, you can allow other computers to sync to your own, hide the systray icon, set the NetTime service to run automatically at Windows startup, establish the maximum free run time, as well as view log details, among other options.

Unsurprisingly, the program had minimal impact on computer performance in our tests, as it used low CPU and RAM to work properly. It didn't hang, crash or display error messages.

Although it hasn't been updated for a while, NetTime still works on newer Windows versions. It's easy to configure and effective for keeping your system's clock accurate.