amoebaOS Online Operating System | Online OS in BetaamoebaOS, the Online Operating System. Get a beta code in our forum. amoeba OS is an advanced online OS, also known as a "Webtop" or "Cloud OS". With amoebaOS, you can run apps online with your files in the cloud, and even develop cloud apps. Use a YouTube video as your desktop, or edit photos directly in your DropBox account. All in your web browser. JavaScript only, no Flash or plug-ins needed.