High Quality Content by WIKIPEDIA articles! The Turnkey Linux Virtual Appliance Library is an open source project developing a free virtual appliance library of pre-packaged servers based on Ubuntu that deploy on bare metal, a virtual machine, and in the cloud. The project's slogan is Best of open source, simplified! Each virtual appliance is a ready-to-use solution that's optimized for ease of use in server-type usage scenarios. Unlike a conventional server installation, an appliance is designed to "just work" with little to no configuration required.