Post-transition metals
Post-transition metals occupy the lower part of the p-block. Less metallic than transition metals, they show transitional traits toward the metalloids.
Aluminium, gallium, indium, tin, thallium, lead, bismuth, polonium: all are p-block metals whose d (or f) subshell is already full. They often melt at low temperatures (gallium melts in your hand at 29.8 °C, tin at 232 °C), are malleable, and protect themselves with a passive oxide layer.
Aluminium is a special case: the third most abundant element in the Earth's crust, massively used since the 20th century (Hall-Héroult electrolysis). Tin and lead have been known since antiquity and serve in alloys (bronze, solder, lead shot, lead-acid batteries).
The transactinides Nh, Fl, Mc and Lv are sometimes classified here by extrapolation, but their chemical properties are essentially theoretical.