What is Bzip2
Bzip2 is extension of Unix-Linux ARchive File. It may be used with Winrar Software.
It is a file compression method that is used with Unix/Linux operating systems. Bzip2 files have quite fast performance. Those can be opened by Winrar or Bzip softwares. You can download free from the internet.
Viewer or Converter for Bzip2
Which pages about Bzip2