I have Winrar, which I bought from Rarlabs back in 2005 and love it. But there are several "free" programs on the web now that can open both zip and rar. One of them is called 7zip. There are others, but I will have to research them to get you the names of more of them. If you do a web search and type in "rar extractors" though, you should be able to find several. If you have a Mac, let me know and I'll help more.