PSR 0329+54 is among the strongest known pulsars, and was one of the first discovered. It has a pulse period of about 0.715 seconds. PSR 0833-45 resides in the Vela supernova remnant. It spins much faster, with a period of 89.3 milliseconds.
PSR 1937+21 is the the fastest known pulsar, and was the first millisecond pulsar discovered. It spins on its axis every 1.56 milliseconds, or over 640 times per second. ("Faster than a kitchen blender!") PSR B0531+21, The Crab Pulsar - This is the youngest known pulsar and lies at the centre of the Crab Nebula, the supernova remnant of its birth explosion, which was witnessed by Europeans and Chinese in the year 1054 A.D. as a day-time light in the sky. The pulsar rotates about 30 times a second.
PSR J0437-4715 - This is a recently discovered millisecond pulsar, an old pulsar which has been spun up by the accretion of material from a binary companion star as it expands in its red giant phase. The accretion process results in orbital angular momentum of the companion star being converted to rotational angular momentum of the neutron star, which is now rotating about 174 times a second.
Ambroise Barras, 2003