* First p2p to use tiger tree hashes
* First to have a virtual library view
* First to support SHA1 hashes in torrents ... others added to accomodate
* First P2P to use magnet uri's
* First to support a social realm browseable (library and user profile)
* a UDP transciever, one that actually scales back due to congestion ... what utorrent calls uTP ... ideas where in Shareaza.
* First to have and still the only one to have customizable download folders which moves files of different types upon completion.
* Only P2P client to have such detailed control over upload settings.
I'll list more as memory returns
, but Shareaza was truly a trend setter. Also just the features alone in the security window and the security features alone are items for which Shareaza did first and in some cases is the only one doing it.