Generic machine emulator and virtualizer able to run software built for one architecture on any other — the backbone of Linux virtualisation with KVM, and the tool that lets preserved operating systems and software of the past actually run today.
The Preservation Rating scores how well this entry is archived — not how good the software is. It's calculated automatically from what's already on this page: working mirrors, documentation, a reproducible build, a clearly identified license, and complete metadata. Nothing here is entered by hand; it updates itself whenever the entry changes.
