1.apereo / casApereo CAS - Identity & Single Sign On for all earthlings and beyond.sso-authenticationauthenticationauthorizationjavawebssosaml2+14 moreJavaAPACHE-2.011K total4K forks+123 starsfrom 11,269 · score 4.82
2.pac4j / pac4jSecurity engine for Java (authentication, authorization, multi frameworks): OpenID Connect, SAML2, CAS, OAuth, LDAP, JWT...javasecurityauthenticationauthorizationcasoauth+14 moreJavaAPACHE-2.02.5K total712 forks+34 starsfrom 2,505 · score 3.56
3.pac4j / vertx-pac4jSecurity library for Vert.x: OpenID Connect, SAML2, CAS, OAuth, LDAP, JWT...javavertxsecurityauthenticationauthorizationcas+14 moreJavaAPACHE-2.0135 total35 forks+2 starsfrom 133 · score 1.10