Managing Backup Files
Plesk Control Panel

Bludit is a simple web application to make your own blog in seconds, it's completly free and open source. Bludit uses flat-files (text files in JSON format) to store the posts and pages, you don't need to install or configure a database.

WonderCMS is a completely free open source Content Management System, or in other words, a free website builder.

Tiki is a CMS/Groupware which offers a large number of features "out-of-the-box" arguably more than any other Open Source Web Application. It can be overwhelming, even to an experienced user or administrator.

CodeIgniter is an open-source software rapid development web framework, for use in building dynamic web sites with PHP.

Vue.js is an open-source progressive JavaScript framework for building user interfaces.

JavaScriptMVC is an open-source rich Internet application framework based on jQuery and OpenAjax.

dotCMS is an open source content management system (CMS) written in Java for managing content and content driven sites and applications.

JSP Hosting on Linux Servers.

eXo Platform is an open source, standard-based, Enterprise Social Collaboration Platform written in Java.

OpenCms is an open source content management system written in Java.

Apache Roller is a Java-based Open Source "full-featured, Multi-blog, Multi-user, and group-blog server suitable for blog sites large and small".

OpenKM is a Free/Libre document management system that provides a web interface for managing arbitrary files.

Private JVM hosting with pre-installed Tomcat server.

Ametys is a free and open source content management system (CMS) written in Java.

Java Hosting packages on Linux servers.

Google Web Toolkit, or GWT Web Toolkit, is an open source set of tools that allows web developers to create and maintain complex JavaScript front-end applications in Java.