Notable neutron stars

Neutron stars are formed by the gravitational core collapse of massive stars during a Type II supernova. As such, they are dead (degenerate) because they no longer generate fusion. Different types include:

Pulsar - Rapidly spinning neutron star
Double pulsar - Two rapidly spinning neutron stars orbiting each other
Millisecond pulsar - Pulsar that rotates more than a thousand times a second
X-ray binary pulsar - X-ray spectrum pulsar with a stellar companion
Magnetar - Highly magnetized neutron star
Merger - Two neutron stars colliding creating massive gravitational waves

HR 6819 is actually a black hole and two stars forming a trinary system. These stars are visible to the naked eye.

Kesteven 79 pulsar Aquila
PSR B0329+54 pulsar Camelopardalis
PSR B0329+54 pulsar Camelopardalis
3C 58 pulsar Cassiopeia
Cas X-1 X-ray pulsar Cassiopeia
Centarus-X3 X-ray pulsar Centaurus
Circinus X-1 X-ray pulsar Circinus
Hand of God pulsar pulsar Circinus
GX 301-2 X-ray pulsar Crux
Cygnus Loop pulsar pulsar Cygnus
LMC N49 Gamma-ray repeater Dorada
SN 1987A pulsar Dorado
Tarantula Nebula pulsar pulsar Dorado
Kesteven 75 pulsar Eagle
Geminga pulsar Gemini
Jellyfish Nebula pulsar pulsar Gemini
Hercules X-1 X-ray pulsar Hercules
GW170817 merger Hydra
PSR B0943+10 pulsar Leo
RCW 103 radio-quiet neutron star Norma
M15-C double pulsar Pegasus
4U 0352+309 X-ray pulsar Perseus
Cosmic Cannonball pulsar Puppis
PSR J0737?3039 double pulsar Puppis
Black Widow Pulsar millisecond pulsar Sagitta
Bursting Pulsar X-ray pulsar Sagittarius
SGR 1806?20 magnetar Sagittarius
M4 pulsar pulsar Scorpius
PSR J1719-1438 millisecond pulsar Serpens
Crab Pulsar pulsar Taurus
J0337+1715 millisecond pulsar Taurus
PSR J0348+0432 pulsar Taurus
Spaghetti Nebula pulsar pulsar Taurus
Calvera radio-quiet Ursa Minor
Vela Junior pulsar pulsar Vela
Vela Pulsar pulsar Vela
Vela X-1 X-ray pulsar Vela
Lich pulsar Virgo
LGM-1 pulsar Vulpecula