This Online tool can be found here:

A very Easy to use online stop watch for all your IT needs, including:

• limiting meeting sections (lets not talk about this subject more than 10 minutes)
• counting time to measure a time limited action (how much time it really took the switch to reboot)
• testing to see if an IT action was able to finish within the time limit set (DB switch should be completed in 5 minutes)

etc …

it has 2 useful modes:

• Stop Watch
• counter

both look like this:

but you setup the counter with this preliminary screen: