Afterlife

The afterlife was known as Slawcor by the Grel. (PROSE: Oh No It Isn't!)

History
When Davros was left near death following a Thal bombing on his laboratory during the Thousand Year War, he saw a vision of his mother Calcula which urged him to survive and live on. (AUDIO: Corruption)

After Katarina's death, she entered an afterlife virtually identical to that of Greek mythology. She was unable to cross the River Styx, but a manifestation of her idea of the First Doctor helped her get to the Elysian Fields, the abode of the blessed. (PROSE: Katarina in the Underworld)

According to one account, every living creature of N-Space had an N-Form which lived in Null-Space. After an individual died, their N-Form would leave Null-Space to enter a higher plane of existence, while their negative emotions would be left behind in Null-Space and devolve into monstrous beings. (AUDIO: The Ghosts of N-Space)

Compassion created the City of the Saved as an afterlife for all of humanity. (PROSE: Of the City of the Saved..., Salutation, et al)

The Beautiful Death, an attraction at the Festival of Death, allowed the users to temporarily die for half an hour and tour the afterlife. (PROSE: Festival of Death)

After Grace Holloway was resurrected by the Eye of Harmony, she mentioned that death was "nothing to be afraid of", but did not elaborate. (TV: Doctor Who)

When Eugene Jones died, a Dogon sixth eye he had swallowed before his death removed his consciousness from his body and left it in a ghost-like state between life and death. After Eugene saved Gwen Cooper from dying the same way as him, his spirit passed into the afterlife. (TV: Random Shoes)

According to John Tucker, Suzie Costello and Owen Harper, there was nothing but darkness in the afterlife. When Suzie and Owen were dead, they were in a dark void, with Death stalking them in the darkness, and were otherwise alone. (TV: Everything Changes, They Keep Killing Suzie, Dead Man Walking) Due to this, Owen and Suzie both greatly feared death, (TV: They Keep Killing Suzie, Exit Wounds) but Owen also seemed to consider death and this dark void afterlife an end to and release from all the good and bad things in life. (TV: A Day in the Death) However, this afterlife realm was not specified as all that existed after death, nor was it an absolute fate: one's soul could be pulled back out of it via a resurrection gauntlet or life knife if their body was fairly intact. (TV: Everything Changes, They Keep Killing Suzie, Dead Man Walking)

After Owen and Toshiko Sato's deaths, Gwen Cooper tried to use an alien artefact to send messages to them in the afterlife. (AUDIO: In the Shadows)

After bombing two Sontarans at the Siege of Trenzalore, the Papal Mainframe proceeded to select them an appropriate afterlife. (TV: The Time of the Doctor)

Seb described the Nethersphere to CSO Matthew as having a range of names, including the afterlife and the Promised Land. (TV: The Caretaker)

Cultural beliefs and interpretations of the afterlife
According to the Twelfth Doctor, almost every culture in the universe had some understanding of the concept of and adhered to the possible existence of an afterlife. The Doctor himself stated he had always meant to look around for one, but never got around to it. (TV: Dark Water)

Some cultures, such as some those of humans on Earth, believed that after death, people went to one of two realms: an eternal paradise called Heaven, or a realm of punishment called Hell or Jahannam. (AUDIO: Lost Souls, TV: The God Complex)

Rita, a Muslim, mistakenly believed that the prison ship she was trapped on was Jahannam. (TV: The God Complex)

In 1863, an alternate dimension which shaped itself according to the wishes of its inhabitants was initially mistaken for the afterlife. (PROSE: Empire of Death)

Draconian culture believed in a Heaven-like afterlife in which the Deathless Emperors spent their time playing games with sazou. (AUDIO: Paper Cuts)

In Kahler culture, it was believed that after one died, they would be forced to climb a mountain, carrying the souls of everyone they had wronged in life. (TV: A Town Called Mercy)

The Papal Mainframe once boasted that they could "notify" the appropriate afterlife based on a person's beliefs in life after they had been killed on their watch. (TV: The Time of the Doctor)