JBoss

JBoss is Red Hats Java EE 5-compliant (soon Java EE 6-compliant) application server.

Apache Tomcat

An open source software implementation of the Java Servlet and JavaServer Pages technologies

Jetty is a highly scalable modular servlet engine and http server that natively supports many modern protocols like SPDY and WebSockets.

LiteSpeed Web Server (LSWS) is a high-performance Apache drop-in replacement.

Oracle WebLogic Suite is an application server for building and deploying enterprise Java EE applications.

Payara Server is fully supported, developer-friendly, open source application server. Innovative, cloud-native, optimized for production deployments.

Phusion Passenger is a multi-language (Ruby, Python, Node) web & app server which can integrate into Apache and Nginx

PostgreSQL is a powerful, open source object-relational database system.

Pusher is a hosted API for quickly, easily and securely adding scalable realtime functionality via WebSockets to web and mobile apps.

Unicorn is an HTTP server for Rack applications designed to only serve fast clients on low-latency, high-bandwidth connections.

Learn how you can use application servers from IBM to quickly create, connect and optimize applications on premises and on the cloud.