Shareaza Speed Booster - Version 1.0 Shareaza Speed Booster is a FREE and easy to use add-on to a popular Gnutella file sharing network. Shareaza Speed Booster greatly improve download and search speed of Shareaza by optimizing internet bandwidth usage and connection settings. It also provides further improvements to the core Shareaza client. What can make it more attractive is the fact that it is a Freeware!