zTimer is a portable and tiny (59 KB) program which really helps to control run time of tasks and doing them more quickly. It shows countdown timer and two seconds counters on a small always-on-top window.
sasuketiimer(2009.04-) looks like the timer shown at the right upper corner on Sasuke, a Japanese program, inspired me to make this timer when I learn programming. It also contains some simple tools related to time management.