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. But hey, it's free!
Note to students: this is not Respondus LockDown Browser and is not a student application used for taking online exams. Contact your instructor to obtain the correct download link for LockDown Browser.