SuperTeacherTools.net and Online-Stopwatch.com provide free online timers, as of 2015. Online-Stopwatch.com allows visitors to choose variations such as egg timers, rocket timers and alarm clock timers.
Find free, online class timers on Online-Stopwatch.com by choosing a type of timer on the home page. The next page provides prompts to enter the starting time and then to click Start. The website features countdown timers and stopwatch timers.
Find a free, online timer on SuperTeacherTools.net by clicking Use Classroom Countdown near the bottom of the home page. The next page provides prompts to enter minutes and seconds and then to click Start The Clock.