Corkboard Connections: Fun Countdown Timers for the Classroom. Not an app, but online timers that may be used on a Smartboard.
Grocery shopping is always a drag for me, so I found a way to make it a bit cheerier and a ton more efficient. I created this master grocery list in my bullet journal so I can use it again and again.
With so many recipes app proliferating the net, I still find Yummly a real visual treat. Yummly Mobile by Douglas Hughmanick, via Behance