Payara Server - Payara Server is a fully supported, developer-friendly, open source application server. Innovative, cloud-native, optimized for production deployments. Jakarta EE & MicroProfile compatible.
GitHub Pages - A free, static web host for open-source projects on GitHub
JBoss - JBoss is Red Hats Java EE 5-compliant (soon Java EE 6-compliant) application server.
Netlify - Build, deploy and host your static site or app with a drag and drop interface and automatic delpoys from GitHub or Bitbucket
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Coolify - An open-source, hassle-free, self-hostable Heroku & Netlify alternative.