Whonix, an operating-system setup designed for strong online anonymity.
It is a privacy tool that isolates a user's network activity from their working environment.
It uses a two-virtual-machine design paired with the Tor anonymity network, so the part of the system doing your actual work is kept separate from the part that touches the internet, forcing all traffic through Tor.
It represents the technical toolkit people use to stay anonymous and resist tracking online.