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All available pac4j implementations:

All pac4j implementations offer similar features:

Spring Web MVC
(Spring Boot)

JEE

Shiro

Spring Security
(Spring Boot)

Play 2.x

Vertx

Spark Java

Javalin

Ratpack

Pippo

Undertow

CAS server

JAX-RS

Dropwizard

Lagom

Knox

Jooby