Yes, you can get 7-Zip or WinRAR programs to help unpack .RAR files.
7-Zip, a free product, can be found here: *www.7-zip.org/
WinRAR, a commercial product, can be found here: *www.rarlab.com/
The difference between them is only that WinRAR can create .RAR files while 7-Zip can't do so.