http://wow.curse.com/downloads/wow-addons/details/kharthuss-hunter-timers.aspx (http://wow.curse.com/downloads/wow-addons/details/kharthuss-hunter-timers.aspx)
I love this addon I've used it since Wrath and it makes raiding a lot easier. It has a list of everything you have on cooldown including trap durations with a bar and timer so you can easily see whats going on without having to look at your bars. <3