I was kinda leading a seminar with strict time limits for several speakers, and it was hard to keep track. I had a list of speakers and what time they should start and stop, but things happened, you know. Sometimes we where ahead sometimes behind schedule. Parts where shuffled around. I had to keep peoples start times in mind all the time and only checked against my PC clock w/o seconds.
I really wished for a clock tool with several buttons for "count down X/Y/Z min". Does this exist?