Respondus LE is a "print only" version of Respondus that's available for free. This version of the software lets you open or create Respondus-formatted files and print a traditional paper-based exam.
The main difference between Respondus LE (LE = Limited Edition) and the full version of Respondus is that LE doesn't include the features that allow you to work with course management systems—that is, you can only print exams.