compress files

Question:
compress files
Is there any program that would compress files more than win zip/rar?
I have Norton ghost 9.0 and it compresses 50% but you cant open the files.(You can only recover the whole system)
Answer: I've heard the 7-zip format is pretty good but I haven't used it yet.
Answer: I just tried 7-zip.
windows folder
1.64 mb
Win rar
1.60 mb
7-zip
1.61 mb
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