Mercury would be one of the elements.
Elements that are liquid at room temperature is Mercury, bromine, Gallium, Cesium.....
Mercury ("liquid silver," Hg, element 80) and bromine (Br, element 35) are liquid at room temperature, 68° to 70° Fahrenheit (200 to 250 Celsius). Gallium (Ga, element 31), with a melting point of 85.60 Fahrenheit (29.80 Celsius), and cesium (Cs, element 55), with a melting point of 830 Fahrenheit (28.40 Celsius), are liquids at slightly above room temperature.
Sources: Brown, Theodore L. Chemistry, 4th ed., pp. 140, 143; Hackh, Ingo W. D. Grant and Hackh's Chemical Dictionary, 5th ed., pp. 96, 362; Science and Technology Illustrated, vol. 6, p. 658.