Kagarigari

"There is a human-hunting case which has thrown a town into confusion. The culprit is a vampire...A boy wielding a sword appears in front of the violent vampire?!" - official synopsis (translated)

Kagarigari is one of the 70th Shonen Jump Newcomer Treasure Award-winning​ entries and is the prototype to Kimetsu no Yaiba.

(Souce: Anilist)

Kimetsu no Yaiba: Katahane no Chou

The second light novel written by Aya Yajima for Kimetsu no Yaiba containing six stories.

1. Katahane no Chō
The story of how the Kouchou sisters ended up becoming Demon Slayers.
2. Tadashii Onsen no Susume
Uzui motivates Zenitsu to complete his training by offering him the chance to join a mixed-gender bath. Excited, Zenitsu agrees, roping in Inosuke to help him finish the task.
3. Kanroji Mitsuri no Kakushigoto
Mitsuri begins to feel troubled after learning about the reason why Shinobu joined the Demon Slayer Corps. Feeling selfish, she begins to avoid the other Hashiras. Obanai and Shinobu, not knowing what's wrong, brainstorm ways to cheer her up.
4. Yume no Atosaki
Genya enjoys a quiet day in the Butterfly estate amidst thoughts of his older brother.
5. Warawanai Kimihe
The pillars get together to make Tomioka laugh.
6. Chūkōikan ☆ Kimetsu Gakuen Monokatari ~ Paradaisu・Rosuto
A cute short about the Kimetsu no Yaiba cast as modern-day students preparing for the upcoming school festival.

(Souce: Anilist)

Kimetsu no Yaiba: Shiawase no Hana

The first light novel written by Aya Yajima for Kimetsu no Yaiba containing five chapters, as well as an afterword.

1. Shiawase no Hana
Takes place after the Drum House arc and centers around Tanjiro, Zenitsu, and Inosuke bonding while attending a village wedding.
2. Dare ga Tame ni
Takes place after the Natagumo Mountain arc during a "date" between Zenitsu and Nezuko. Zenitsu begins to reminisce about his past encounter with a woman named Sayuri.
3. Uranai Sōdō Tenmatsuki
Takes place after the Infinity Train arc. Shinobu attempts to cheer the Kamaboko trio up by sending them to buy sweets. On the way back to the Butterfly Mansion, the trio encounter a fortune teller.
4. Aoi to Kanao
Shinobu sends Kanao to accompany Aoi on a trip to the apothecary.
5. Chūkōikan ☆ Kimetsu Gakuen Monokatari
Modern-day school alternate universe where Zenitsu has had enough of the Morals Committee and begs his friends to help him quit the club. A seemingly easy task becomes complicated when all of the teachers turn out to be unreliable.

(Souce: Anilist)

Kimetsu no Yaiba: Tomioka Giyuu Gaiden

Side-story of Giyuu Tomioka shortly after meeting Tanjirou.

Kimetsu no Yaiba: Kaze no Michishirube

The book will be a short story collection, but will primarily center on the Wind Hashira, Sanemi Shinazugawa.

(Source: Anime News Network)

Kimetsu no Aima!

A four-panel gag manga spin-off of Kimetsu no Yaiba manga. The manga will feature SD versions of the characters from the main manga. It'll release in Jump + website after each anime episode premiere, featuring stories covered by the anime.

(Source: MU)

Kimetsu no Yaiba: Tokubetsu Yomikiri

Special one-shot about Rengoku's First Mission.

Kimetsu no Yaiba: Rengoku Kyoujurou Gaiden

Since ancient times, rumors have abounded of man-eating demons lurking in the woods. Because of this, the local townsfolk never venture outside at night. Legend has it that a demon slayer also roams the night, hunting down these bloodthirsty demons. Set before the events of the main series, this spinoff tells the story of Rengoku Kyoujurou, an energetic young demon hunter, as he takes over his family’s role as the Flame Pillar. (Source: Mangadex)

Kimetsu no Yaiba: Gaiden

Giyu heads north to an area where a band of hunters was killed. He and the Insect Hashira meet Yae, the daughter of a slain hunter, who believes a bear killed her father, but the truth is harder to face. Kyojuro also receives his newest assignment and hopes completing it will prove he’s worthy of the title Flame Hashira, which his father abandoned. An explosive battle unfolds as Kyojuro takes on a demon of the Twelve Kizuki who holds a grudge against Kyojuro’s father.

(Source: Viz Media)

Kimetsu Gakuen Monogatari

Kimetsu no Yaiba: Hashira Geiko-hen

The members of the Demon Slayer Corps and their highest-ranking swordsmen, the Hashira.
In preparation for the forthcoming final battle against Muzan Kibutsuji, the Hashira Training commences. While each carries faith and determination within their hearts, Tanjiro and the Hashira enter a new story.

(Source: Crunchyroll)

Notes:
• The first episode has a runtime of ~1 hour and received an early premiere in cinemas as part of a special screening alongside the final episode of Kimetsu no Yaiba: Katanakaji no Sato-hen.

Kimetsu no Yaiba: Yuukaku-hen

After visiting the Rengoku residence, Tanjirou and his comrades volunteer for a mission within the Entertainment District, a place where desires are sold and demons dwell. They journey alongside the flashy Sound Hashira, Tengen Uzui, in search of a monstrous foe terrorizing the town. Sworn to slay creatures of the night, the hunt continues.

(Source: Funimation)

Kimetsu no Yaiba

It is the Taisho Period in Japan. Tanjiro, a kindhearted boy who sells charcoal for a living, finds his family slaughtered by a demon. To make matters worse, his younger sister Nezuko, the sole survivor, has been transformed into a demon herself. Though devastated by this grim reality, Tanjiro resolves to become a “demon slayer” so that he can turn his sister back into a human, and kill the demon that massacred his family.

(Source: Crunchyroll)

Kimetsu no Yaiba: Katanakaji no Sato-hen

Tanjiro’s journey leads him to the Swordsmith Village, where he reunites with two Hashira, members of the Demon Slayer Corps’ highest-ranking swordsmen - Mist Hashira Muichiro Tokito and Love Hashira Mitsuri Kanroji. With the shadows of demons lurking near, a new battle begins for Tanjiro and his comrades.

Notes:
• The first episode has a runtime of ~49 minutes.
• The final episode has a runtime of ~52 minutes.

Kimetsu no Yaiba: Mugen Ressha-hen

The TV version of Kimetsu no Yaiba Movie: Mugen Ressha-hen including an entirely new first episode. The first episode depicts Rengoku as he embarks on his journey to the Mugen Train. The remaining episodes will add about 70 new animation cuts and new background music, as well as a new trailer.

(Source: Anime News Network)

Falling forever into an endless dream... Tanjiro and the group have completed their rehabilitation training at the Butterfly Mansion, and they arrive at their next mission on the Mugen Train, where over 40 people have disappeared in a very short period of time. Tanjiro and Nezuko, along with Zenitsu and Inosuke, join one of the most powerful swordsmen within the Demon Slayer Corps, Flame Hashira Kyojuro Rengoku, to face the demon aboard the Mugen Train on track to despair.

(Source: Crunchyroll)

Kimetsu no Yaiba: Mugenjou-hen

The All-Out War Begins.

Theatrical trilogy adaptation of the Infinity Castle Arc.

Since ancient times, rumors have abounded of man-eating demons lurking in the woods. Because of this, the local townsfolk never venture outside at night. Legend has it that a demon slayer also roams the night, hunting down these bloodthirsty demons. For young Tanjirou, these rumors will soon to become his harsh reality...

Ever since the death of his father, Tanjirou has taken it upon himself to support his family. Although their lives may be hardened by tragedy, they've found happiness. But that ephemeral warmth is shattered one day when Tanjirou finds his family slaughtered and the lone survivor, his sister Nezuko, turned into a demon. To his surprise, however, Nezuko still shows signs of human emotion and thought...

Thus begins Tanjirou's quest to fight demons and turn his sister human again.

(Source: VIZ Media)

Volume 7 contains a bonus chapter about Kanao Tsuyuri.
Volume 10 contains a bonus chapter about Inosuke Hashibira.

Kimetsu no Yaiba Franchise