Corkboard Connections: Fun Countdown Timers for the Classroom. Not an app, but online timers that may be used on a Smartboard.
Need to give the class a timed activity, but don't have access to a stopwatch? There's plenty of sites out there that will give you access to a countdown t
This web site has several different timers that would be great on the smart board and students would love them!
Snail Racing Timer & lots of other fun timers
A bunch of fun timers for the classroom. Maybe this will speed up the clean-up process
The BEST visual timers for kids. Helps them stay on task while gaining understanding of time. My class request me to use them for our centers. (FREE)
Classroom Setup: Three Hours and Done! | Scholastic.com
5 Explosive Classroom Timers
I love these! Animated timers that you can put on the projector. Gives students a visual for the time they have remaining. Plus a fun surprise (noise cue) when time is up! :)
Online egg timer - perfect for pretty much everything in the classroom.