Best Free Tray Clock Replacement

TClock Lite [1] is a vastly improved replacement for the standard Windows tray clock. It provides all the benefits of the original clock as well as many enhancements and a number of useful additional features. Furthermore it achieves this with a tiny footprint and doesn't even require installation.

Given the tiny size of the program, the power of this program is most impressive. Less impressive is the help file which is brief and not particularly helpful. However the program is so well laid-out and simple to use that it's not really an issue.

Note that you might get a warning from your security software that TClock is potential spyware. It's not. It's just picking up the fact that it modifies explorer.exe to display the clock. Note too that the link below is to the Japanese author's site. You'll see some strange characters displayed but the "donwload" (sic) link is clear enough :>)

If you want an alternative try the classic TClockEx [2] that offers similar functionality to TClock Lite but it hasn't been updated for a while but appears to run OK on Windows XP systems.

Another alternative that is still being actively developed try AlfaClock [3] which offers a little more functionality at the cost of some additional complexity.

Code:
[1] http://homepage1.nifty.com/kazubon/tclocklight/index.html Freeware, Windows 95 and later, 373KB
[2] http://www.rcis.co.za/dale/tclockex/index.htm
[3] http://www.alfaclock.com/default.html Freeware, all Windows versions, 2MB