Stephen McAvoy wrote:
> 
> You can use Winzip for as long as you like. Just press "Use Evaluation
> Version" Button every time you use it. 

This style of shareware is usually dubbed "nagware".  However from: 
http://www.winzip.com/elicense.htm you can read:

"This is not free software. [....] If you use this software after the 
21-day evaluation period, a license fee of $29 is required."


If $29 is too much for a one-time fee (in the past a license has granted 
perpetually free upgrades) you can get one of the various free versions 
(WIZ, InfoZip and others come to mind, but I use WinZIP and GNU Zip).

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