WinRAR

WinRAR is a compress software. I have used WinZip before WinRAR. RAR can provide higher compression than Zip,and WinRAR not only offer RAR but also ZIP,but WinZIP doesn't offer RAR now.So I get away WinZIP to WinRAR. WinRAR and WinZIP provide almost compress format so that you only install one software.And now several higher compression software release,for example,7zip,uha,uda.Perhaps uha and uda format aren't popular,but it provide much higher compression,especially compress txt,doc.Now uha and uda provide GUI before they run under CMD.But they compress very slowy especially UDA.So I think WinRAR is enough for you.

WinRAR v3.41 Link: http://www.crsky.com/SoftView/SoftView_152.html

UDA author website: http://dwing.51.net/

UHA GUI2.0 chinese version Link: http://www.onlinedown.net/soft/31297.htm

UHA GUI1.5 Link: http://www.onlinedown.net/soft/16307.htm