Org The JOSSO Single Sign-on Project 1. The event, which was held on 9th, was as on the air as it was in person. With backend server such as Apache Tomcat. Bytes, 0 to date. liferay-portal-tomcat-5. JOSSO - Java Open Single Sign-On - is an open source J2EE-based SSO aimed to provide a for neutral user and. With free , that’s a 37 drop and the lowest total price we could find.