BitCam discards the millions of colours the sensor can see and renders what is in front of you in the black-and-white dither of a 1984 Macintosh — Bill Atkinson’s algorithm, doing the job it was written for. Ten years after version 1.0 it has reached 2.0, with an eight-colour mode for when two is not enough and an editor that blends linear and radial gradients. Free to download, with a single $9.99 unlock for the full set, and high-resolution PNG export.