Free alternative to sharepoint

Can someone recommend a free alternative to sharepoint?
Our needs are very humble - share documents :-)

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you can use joomla very simple to use, and you can host it on any computer using a program called wamp
Google Docs
Windows SkyDrive
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I suggest trying SharePoint Foundation.  It comes "free" as part of the Windows Server license.

Take a look at:
Absolutely correct, you can use Microsoft SharePoint Foundation 2010 or WSS 3.0 it's absolutely free. Tomorrow if you would like to go with MSS 2010, it easily upgrdable.
IT_Group1Author Commented:
Thanks All

i will try your recommendations and point out the best one.
IT_Group1Author Commented:
SharePoint Foundation 2010 or WSS 3.0 required windows server web edition?

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Microsoft SharePoint

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