Easy countdownstyle Clock and Scoreboard for Windows Host Your Own Game Show Great for Parties, Team Building or Twitch Streaming (Download Now) - Etsy
Use the Countdown timer web part - Microsoft Support
TimeLeft - FREE countdown, reminder, clock, alarm clock, tray clock, stopwatch, timer, sticker, auction watch and time synchronization utility.
SnapTimer - Free Windows Countdown Timer
Free Timer for Windows - Download
Free Timer for Windows - Download
Sper Scientific 810050 (TIME IT) PC Timer Software for Windows from Cole-Parmer United Kingdom