Triptico offers lots of free resources for teachers. Word Magnets is a great activity for your SmartBoard. It is available free or you can purchase it to be able to save your creations and share activities. There are various backgrounds such as tables and venn diagrams, but you can use it for a simple activity such as creating a sentence and scrambling the words, then let your students put the sentence in order. They can also change the color of words, such as making all adjectives red.
Also on their site, you can find various programs to use with the SmartBoard such as Double Spinner, Timer, Dice, Calculator, Scoreboard, and more!
I highly recommend checking out their site and resources.