This is a list of popular free P2P software, 

i can assure you this software comes with no adware or viruses, 
however downloading stupid files may result in a virus and such, 
so i would recomend using some third party software to remove 
unwanted malware :)

1) Utorrent
2) Limewire
3) ares
4) WinMX
5) bearshare



Included is also software you can use with the P2P software 
(i.e to make your own chat rooms, and things to help control uploads/downloads ect)
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I (the uploader) do not claim any credit for this software, This software simply comes from other websites on the internet. i simply gather the software and put it in one place for easy downloading
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Included in the torrent is links to support websites for each of the programs

If you love P2P and want to keep it alive, You'll Seed!