...It supports standard protocols like VNC, RDP, and SSH.
We call it clientless because no plugins or client software are required.
Thanks to HTML5, once Guacamole is installed on a server, all you need to access your desktops is a web browser.
LightVNC is a remote desktop server that relies only in HTML and HTTP(S). As the only required client software is a web browser, the server can be accessed by devices without remote desktop clients, like game consoles (PS3, Wii) and Smart-phones