Live CD/USB distro designed to be a self-contained Bitcoin Swiss Army Knife that supports air-gapped Bitcoin transactions and makes offline cold storage (slightly more) practical. Developed by TurnKey GNU/Linux. First released in 2014.
It supports verifiably secure Bitcoin wallet creation and transaction workflows that provide defense in depth while minimizing third party trust. Development is guided by the philosophy that you shouldn't have to trust anyone, including BitKey authors and even BitKey itself.