Guacamole is an HTML5 web application that provides access to desktop environments using remote desktop protocols such as VNC or RDP. A centralized server acts as a tunnel and proxy, allowing access to multiple desktops through a web browser. No plugins are needed: the client requires nothing more than a web browser supporting HTML5 and AJAX. guacamole-common-js is the core JavaScript library used by the Guacamole web application.