http://filehippo.com/software/p2p/

http://en.wikipedia.org/wiki/File_sharing

http://www.limewire.com/

http://www.zeropaid.com/software/file-sharing/

http://compnetworking.about.com/od/p2ppeertopeer/tp/p2pfilesharing.htm

http://www.topshareware.com/004009-1-1.htm

http://www.sharing-file.com/

http://www.egnyte.com/

http://www.cc-file-transfer.com/file-sharing.htm

http://www.zultrax.com/p2p

http://www.dltube.net/subcategories137-File+Sharing-1.html

http://download.cnet.com/windows/p2p-file-sharing-software/