iTranslate

Get it here.
Cost: Free

UDL Guideline 2.4 - Promote understanding across languages

This app is a wonderful electronic translation tool that translates both text and verbal language across over 80 languages.  Providing this app can be a quick and easy way to help reduce language barriers in the classroom, but it should not be the only method being used to alleviate this problem.

General Critique
The app is simple to use, as anyone can pick up the app and start using it on the fly.  The menus and tools are highly intuitive.