This is one of the coolest applications I've met in a long time. It's a single executable. Download it, double-click it, assign yourself a username/password, click 'start server.' Then from any modern browser in the world, you can go to the correct IP address and view the desktop, mouse control included. Add a phone call and this is the easiest way to do remote tech support. This kind of software has been around for years, but now it RUNS IN YOUR BROWSER as easy as pi.
ThinVNC is a pure HTML5 & AJAX Remote Desktop implementation. ThinVNC works on any HTML5-compliant web browser. Users can access a remote PC from any computer or mobile OS; no additional plugin or installation will be required on the client side.
via ThinVNC - HTML5 Remote Desktop | Free System Administration software downloads at SourceForge.net.