Chrony is described as 'pair of programs which are used to maintain the accuracy of the system clock on a computer. The two programs are called chronyd and chronyc'. There are six alternatives to Chrony for Windows and Linux. The best alternative is Time-Sync, which is free. Other great apps like Chrony are Meinberg NTP (Free), AboutTime (Free), TimeSync (Free) and Network Time Protocol daemon (Free, Open Source).
NTP client and server download for different operating systems. GUI setup program, full HTML documentation, OpenSSL (Version 0.9.8l) DLL. The installer has been successfully tested on a Preview version of Windows 8 as well.
AboutTime is a superior source of time for your computer. As a time client, it will acquire time from the Internet with great accuracy, and as a server it will provide four kinds of time signals to other computers on your local network.
The Network Time Protocol daemon (ntpd) is an operating system daemon program that maintains the system time in synchronization with time servers using the Network Time Protocol (NTP). This package is the official reference implementation of the NTP protocol.
Network Time System is a time sync software package containing NTP Server and NTP client apps for Windows that provides a precise tool for synchronization of all devices on the network with zero configuration installation.