Add Traefik (#394)

README.md

@@ -369,6 +369,10 @@ _See also: [IT Asset Management]([Ralph](#it-asset-management))_
 * [Smallstep Certificates](https://smallstep.com/certificates/) - A private certificate authority (X.509 & SSH) and related tools for secure automated certificate management.
 * [ZITADEL](https://github.com/caos/zitadel) - Cloud-native Identity & Access Management solution providing a platform for secure authentication, authorization and identity management.
 
+### Single Sign-On (SSO)
+
+- [KeyCloak](https://www.keycloak.org) - Open Source Identity and Access Management ([Source Code](https://github.com/keycloak/keycloak)) `Apache-2.0` `Java`
+
 ## IT Asset Management
 
 *IT Assets Management software.*
@@ -666,6 +670,7 @@ Comparison of NoSQL servers: http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-v
 *Web Performance.*
 
 * [HAProxy](http://www.haproxy.org/) - Software based load Balancing, SSL offloading and performance optimization, compression, and general web routing.
+* [Traefik](https://traefik.io/) - Traefik is a leading modern reverse proxy and load balancer.
 * [Varnish](https://www.varnish-cache.org/) - HTTP based web application accelerator focusing on optimizing caching and compression.
 
 # Resources