Apache Guacamole

Apache Guacamole is an HTML5 web application that provides access to your desktop using remote desktop protocols. It is built to serve as a browser-based client for remote access, so you can connect without installing a native desktop app on the machine you are using.

It is built with Maven and packages into a deployable .war file. That war file can be installed under servlet containers like Apache Tomcat or Jetty. The same codebase also includes official extensions and a JavaScript library.

Apache Guacamole is an Apache Software Foundation project. It is clientless, so once it is installed on a server any device with a web browser can reach the connected desktops, with no plugins or client software to install. Source archives and pre-built .war files are available, and it is meant to run under your own servlet container for self-hosted access.