Gluu builds and operates authentication systems for large organizations to enable strong authentication, single sign-on (SSO), and web access management (WAM).
Gluu's open source authentication & API access management server enables organizations to offer single sign-on, strong authentication, and centralized
LemonLDAP::NG is an open source Web Single Sign On product (WebSSO) written in Perl, plugged into Apache Web Server. LemonLDAP::NG is a free software, released under GPL license.