Sufficiently advanced technology is indistinguishable from magic. - Arthur C. Clarke's third law

Clarketech is a catch-all term for devices that defy the current understanding of science; as such, it is a relative term.
Most Clarketech artifacts are found on or around worlds that are or were LiGaian; many possess interesting or useful qualities, and all of them are interesting to science.

A Clarketech artifact may be valuable only for its scientific, novelty and rarity value, or it can be capable of feats worthy of long, violent and expensive interstellar wars.

Notable examples

Notable hypothetical examples

Specific types of Clarketech