With Filestar you get 6 different skills for working productively with Rzip Compressed File (.rz) files.
About .Rz
Name
Rzip Compressed File
Extension
.rz
Format
Binary
Category
Compressed
Developer
Andrew Tridgell
Description
It's an archive file compressed using rzip which is based on bzip2 compression that compresses data in 2 stages that is: file encoding and compression.