TimeWarp
The TimeWarp utility sets your computer's clock from a time server using the Simple Network Time Protocol (SNTP). Using your computer's internet connection, timing messages from an SNTP time server can be obtained automatically to set your computer clock. ... Using the round trip time from request to receipt, a simple calculation determines the propagation delay between the server and client so that your computer clock can be aligned to within a few tens of milliseconds of the correct time. ... TimeWarp operates in unicast mode where it sends a message to a time server and waits for a reply.
http://home.att.net/~srschmitt/TIMWRP30.zip - 557Kb - Download - Screenshot

Atom Time Synchronizer
is a useful and handy utility to keep your PC clock accurate. It can periodically check and synchronize your computer time with a NIST atomic time server, or synchronize time between computers, and can also act as a time server. Key Features: 1. Synchronize time with NIST atomic time servers 2. ... Can synchronize time with any server running SNTP or TIME protocol 9. ... Display time in either local time or UTC/GMT 11. ... Support SNTP (the Simple Network time protocol) 6. ... Can act as a time server 4.
http://www.lmhsoft.com/atsync.exe - 664Kb - Download - Screenshot

SNTP Wizard ActiveX
SNTP Wizard gives the power to retrieve the exact time from SNTP time servers across the Internet. These times are accurate because they are accessed from Atomic and radio frequency clocks. Some Useful features: Easy to get time information Great for timestamps for Local Time and UTC Can... It is also great for medical time stamping, for medical filing software and many other applications. ... Your mult-tier applications can really benefit from being able to make sure they are all running on the same schedule by synchronizing each computers clock precisely together.
http://www.seekfordsolutions.com/Products/files/IPWizardToolpackv3.exe - 5Mb - Download - Screenshot

Absolute Time Server
Reliable freeware TIME and SNTP server for small to midsize local area networks (LAN) Absolute Time Server is a full-featured time server, which works as WinNT service and is fully RFC-868 and RFC-2030 compatible. Absolute Time Server acts as a background process, has very low system resources... The short list of Absolute Time Server features includes support for RFC-868 (TIME) and RFC-2030 (SNTP) time synchronization protocols, optimized for performance as NT service (and emulation of NT service for Windows 9x systems), WINSOCK 2 support, low consumption of server resources.
http://www.adjusttime.com/downloads/atcs.exe - 970Kb - Download - Screenshot

Net Time Server & Client
The time synchronization application allows you to synchronize your PC's system clock or all PC's system clock in your LAN using various time server types commonly available on TCP/IP networks, such as the Internet or LAN, And multiple time protocols are supported. ... As time server, Net Time Server & Client will itself provide time services to other computers using Simple Network Time protocols(SNTP-RFC2030) or Time Protocols(RFC868). ... Multiple time protocols are supported, include SNTP(RFC-2030), Time(RFC-868).
http://www.han-soft.com/down/NetTime_ins.exe - 1Mb - Download - Screenshot

Express Timesync
Express Timesync is an ideal solution for keeping the computer clock accurate. It allows you to synchronize the clock to the official correct time by using the reliable time servers on the Internet or on LAN. Express Timesync supports SNTP (RFC2030) and TIME (RFC868) protocols and has built-in... The time server test feature allows organizing the reference time server list to include only reliable servers. ... The application uses a prioritized reference time server list. ... You can choose the national time server operating in your region from the built-in list.
http://www.express-computing.com/files/ExpressTimesyncSetup.exe - 1Mb - Download - Screenshot

iTimeSync
The accuracy of your PCs clocks is important for many reasons, but keeping it that way can be a chore. iTimeSync does the job for you by contacting one of many NIST time servers over the internet. No configuration is needed, simply connect to the internet, run the program and press "Correct". ... Other features include detailed logging, auto advance to another server if the selected one fails, auto start, minimize to tray, check without change, correct only minutes and seconds mode, variable time-out, max/min times, and a positive or negative time offset can be set if you are in a obscure...
http://www.sinnercomputing.com/Software/iTimeSync.zip - 33Kb - Download - Screenshot

PresenTense Time Server
PresenTense Time Server is a high performance Windows time server supporting NTP and SNTP protocols. You can use PresenTense Server to synchronize your PC to a primary time source such as an atomic clock on the internet or an inhouse GPS reciever and offer time services to clients on your local... Installation automatically configures default time servers so in most cases, you have an operational time server after the install is complete. ... Fallback to an internet based time server if local GPS hardware fails.
http://www.bytefusion.com/download/bin/ptsvrdemo.exe - 4Mb - Download - Screenshot

Network Time System
Network Time System is a full-featured Client\Server network time synchronization system that allows synchronization of all computers on the network clocks with Internet time servers or any other local source of synchronization. Network Time System allows creation of custom exact time source in... All major time protocols are supported including NTP, SNTP, DAYTIME and NTS (over TCP/IP, IPX, NetBEUI. ... This powerful software solution is ideal for networks of all sizes from small office local networks to large enterprise networks.
http://www.softros.com/downloads/nts.zip - 3Mb - Download - Screenshot

Admin Http Time Sync
(1) The main purpose of the program is synchronizing PC clock using HTTP protocol instead NTP or SNTP protocols. Some users and system administrators need such product because they have problems with standard (NTP,SNTP) synchronization. There are firewalls that make such synchronization difficult. ... The script that shows the server time is delivered with it. ... (5) It has some additional useful options as time offset, synchronize periods, time sources choosing, etc. ... The program can be used with inside LAN HTTP server without any outgoing connections.
http://dn.brigsoft.biz/AdminHttpTimeInst.exe - 606Kb - Download - Screenshot