TimeLeft is a multipurpose time-management tool that can notify you of an upcoming event, count down till your next scheduled study or work break, measure time interval and signal its end, even track online auctions. The program can can also replace Windows' built-in system-tray clock.
"TimeLeft is a versatile desktop utility, which may be used as a countdown clock, reminder, clock, alarm clock, tray clock, stopwatch, timer, sticker, auction watch and time synchronization utility. TimeLeft uses Winamp skins to show digits and text.
The main feature of TimeLeft is a powerful customizable reminder, which can show a message, play music (any formats including mp3) or open a link, document, execute an application, turn off your monitor or shutdown your PC."