Borophene is the name for atomically thin, two-dimensional (2D) sheets of boron. Whereas boron is a nonmetallic semiconductor in its bulk form, it becomes a metallic conductor in 2D, even at a thickness of only one atomic layer. Among 2D materials, borophene has attracted considerable attention owing to its unique chemical structure and impressive electronic conductivity and surface properties. A recent review of the state of borophene research discusses various growth techniques and application areas for borophene and provides an in-depth summary of the material's electronic, optical, thermal, and elastic properties compared to its 2D cousins.