Had a request for help finding a classroom time early in the new school year. The teacher needed a way to countdown the time in her class. Because we are a mixed-platform school I wanted to offer her a tool that would work on my Windows/Ubuntu laptop as well as her Apple laptop. This one met all of our criteria and made the teacher very happy.

Countdown Timers download | SourceForge.net

Countdown Timers download | SourceForge.net.