What are some examples of pendulums?

There are many examples of pendulums around us.

• A swing on which a child can ride.
• A plumb line used by builders to obtain a true vertical measurement.
• A pendulum on a grandfather clock, which is calibrated to have a period of 2.0 s.
• A Foucault's Pendulum will demonstrate the rotation of the earth.
• Early seismometers used pendulums with pens on the points to draw the seismograph.
• Taipei 101 Building (pendulum is used to stabilize the building )
• Metronomes to keep a steady beat for musicians, like the one in the picture below: