For gnutella, bearshare lite : http://www.bearshare.com/lite

Another fast network but with less content: http://aresgalaxy.org/

Ciao

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Liens d'intérêt /Links of interest:
Gnutellaforums en français /The House's rules you have to respect / First search the forum, then create a thread / Free software alternatives! - Logiciels alternatifs gratuits!/