Managing Backup Files
Plesk Control Panel

FlatPress is a blogging engine that saves your posts as simple text files. Forget about SQL! You just need some PHP.

Pixie is a free, open source web application that will help quickly create your own website.

MODX helps you take control of your online content. An Open Source PHP application framework, it frees you to build sites exactly how you want and make them 100% yours. Zero restrictions and fast to build. Super-simple templates in regular HTML/CSS/JS (any lib you want). Registered user systems and a killer community. Welcome to web-building nirvana.

SiteCake is a drag and drop CMS for simple websites. It lets you publish the content just by dragging it to your web page. It's CMS for static websites, with few pages only, to cover the niche below WordPress level of complexity.

Wakanda is a JavaScript platform to develop and run web or mobile apps.

sNews is a completely free, standards compliant, PHP and MySQL driven Content Management System. sNews is extremely lightweight, simple and customizable. It's easy to install, and easy to use via a simple web interface. sNews consists of only one core engine file, one independent template file and its accompanying CSS stylesheet file, plus an .htaccess file that makes all URLs search engine friendly.

Unit testing framework for Javascript

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

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

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.

SmartClient is set of mobile and cross-browser HTML5 UI components combined with a Java-based Ajax framework, created by Isomorphic Software to build business web applications.

JSP Hosting on Linux Servers.

Tomcat Hosting on Linux Servers.

Hippo CMS is an open-source, dual licensed, Content Management System.

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.