[joecool1029]

It's open source. Here's the license: https://github.com/pmachapman/unrar/blob/master/license.txt

(There is one single restriction added that you are not allowed to create a rar archiver with it, only a tool to handle existing rar files)

[o11c]

Other than that, Mrs. Lincoln, how was the play?

A single restriction is enough to ruin everything.