Thyme - The task timer for OS X.
T-Clock Redux - T-Clock Redux in an enhanced fork of Stoic Joker's T-Clock 2010 with ISO week number support...
XNote Stopwatch - Try the most feature-rich stopwatch and timer software on the net for free!
ClocX - ClocX - freeware analog clock for Windows desktop with many features like calendar, alarms, skins, antialiasing and transparency.
SnapTimer - SnapTimer is a simple, free, portable countdown timer for Windows.
DS Clock - Keep your time synchronized with Atomic Time servers, using customizable digital desktop clock with westminster chimes.