The Editable IWB Dictionary (ictgames.com) lets you store useful words and view them in a 3D scrolling dictionary. This can be really useful when working with Guided Groups in Literacy, making the IWB a powerful spelling resource during the main activity, not just the teaching input.
You can download this resource for free from the ictgames website: www.ictgames.com/IWBdictionary/
All of the words are stored in a text file which comes with the game. If you open this text file you can add words, save the file and they will be sorted into alphabetical order and placed on your dictionary. You can keep as many copies of the resource as you like. In that way you can have a Science, Topic or MFL dictionary too.
Have fun, James :)