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.
ThinVNC exploits HTML5 canvas to display a remote PC desktop without requiring any additional plugin, add-on, or installation of any kind on the client side. Regardless of the computer or mobile operating system, ThinVNC provides native, secure data transmission using HTTP and SSL. It includes a Presentation Manager and can be set up as a gateway to proxy other ThinVNC instances.
noVNC is a VNC client implemented using HTML5 technologies, specifically Canvas and WebSockets. It supports "wss://" encryption (SSL/TLS). For browsers that do not have native WebSockets support, the project includes web-socket-js, a WebSockets emulator using Adobe Flash. In addition, as3crypto has been added to web-socket-js to implement WebSocket SSL/TLS encryption, i.e. the "wss://" URI scheme.