LionShare is a software project designed to facilitate file sharing among educational institutions around the world. It is based on the free and open-source LimeWire file sharing program written in Java.
LionShare began as an experimental software development project at Penn State University and has now grown to be a collaborative effort between researchers and developers at Penn State University, Massachusetts Institute of Technology, Simon Fraser University, and the Internet2 P2P Working Group. A grant from the Andrew W. Mellon Foundation funded the first two years of the project.
As of March 2008, the latest version of LionShare is 1.2 (released on 2007-11-09).