I've used Noldus Observer before, but can't afford it now. I'm not sure that it matters, but this is for scoring frequencies and durations of rodent behaviors within neuroscience/ethology studies using digitally recorded videos.
I'd like to have the capability of running simultaneous timers that can be independent or dependent on one another (depending on my optimizations), while also being able to tally frequencies of select behaviors/events independently. Ideally, the tallying and/or starting or stopping of timers would be tied to selected (ideally programmable) keystrokes.