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All available pac4j implementations:

All pac4j implementations offer similar features:

JEE

Spring Web MVC
(Spring Boot)

Spring Webflux
(Spring Boot)

Shiro

Spring Security
(Spring Boot)

CAS server

Syncope

Knox

Play 2.x

Vertx

Spark Java

Ratpack

JAX-RS

Dropwizard

Javalin

Pippo

Undertow

Lagom

Akka HTTP

Jooby