From Viz:

Yuji has just started a new semester of high school and everything seems to be normal. That all changes when a mysterious man named Friagne begins turning people into blue flames. And wouldn't you know it? Now he's after poor Yuji!
To the rescue comes a girl named Shana. But is she too late? As it turns out, young Yuji may already be dead. What the heck is going on?

Based on the events of the tenth Shakugan no Shana novel.

Meet hard-boiled cop Boyle Samejima. He's just been assigned to the remote Ogasawara Islands. There he finds coworkers, a mysterious young girl and a dolphin for a partner?! Cop x girl x ocean! Welcome to the craziest hard-boiled cop story you'll ever read!

Ever since their champion was defeated, the world of girls' junior high ping pong has been in turmoil. Koyori is the new smirking transfer student at her junior high and she's ready to shake up girls' ping pong.

How did the phrase "Surf with me." became a connotation for "Sleep with me"? There are strange rumors surrounding Ha Doyoon, and Sung Jin, curious to find the truth behind those rumors, approached him. The events that unfolded during the 3 days that followed only made him more and more confused.

Do-hee Woo and Hae-Gyung Kim are both young and single, each with a history of broken relationships in their past. They meet one day while trying to dine alone at the same restaurant and they soon become friends who eat together every week. But with each meal, their friendship grows deeper as they help each other heal from the heartbreak they have suffered and soon they must redefine what they mean to each other.

From: Easy Going Scans

Deadly chemicals, lab rats, mutations to the genes and a mysterious case of death. Shamans--the people who can see and treat the dead. One of them often spies a girl--the girl his step-brother choked to death.

A world where ‘Hexes’ exist. This is a story about a young Shaman and his companions saving the world from ‘Curses’.

The repeat test-taker Ha Beodeul becomes a shaman and meets the foul tempered lesser dragon, Gwangcheoli.

Yoh Asakura is a shaman--one of the gifted few who, thanks to training or natural talent, can channel spirits that most people can't even see. With the help of his fiancée, Anna, Yoh is in training for the ultimate shaman sports event: the "Shaman Fight in Tokyo," the once-every-500-years tournament to see who can shape humanity's future and become the Shaman King. But unfortunately for Yoh, every shaman in the world is competing for the same prize…

A collection of oneshot stories relating to various Shaman King characters. This is an on-going series, with new chapters being released infrequently. Each chapter is not officially numbered, but the chapter number relate to the order they were released. The "Yahabe" oneshot chapter and the "Merry Christmas On Board" mini-chapter were included in Shaman King Zero volume 2 which have been previously released in other mediums.

The beginning of chapter 6 and the end of chapter 7 connect to after Shaman King Flowers chapter 18 (may contain some spoilers for that series).

Yahabe
Yosuke Kamogawa had nothing to live for, but a mysterious pyramid appears called Yahabe! With the power to turn back time, how will Yosuke's life change?

This is the first character book for the Shaman King series. It is very text heavy, and focuses alot of the characters.

The sequel to the Shaman King and Shaman King Kang Zeng Bang series. Takes place 10 years after the end of Shaman King Kang Zeng Bang and focuses on the life of Hana in his teenage years.

Continuing after the events of Shaman King Red Crimson, the story shifts to X-Laws and their mission to locate Marco who has gone missing since the events at the end of the original manga series.
(Source: Mankin-Trad: https://mankin-trad.net/2020/08/07/upcoming-projects/)

The start of the first official spin-off series for Shaman King featuring the Tao Family and their fight against the Red Crimson!

A new collection of short manga (3-7 pages) printed in the back of the Shaman King Remix Editions (Reprint editions). Each story takes a closer look at a side-story not in the original (or KZB) edition of the Shaman King. Because of their humorous nature, the "plot" of these shorts should not be taken seriously in the series' proper storyline.

Continuing after the events of Shaman King Flowers, the group of "Super Stars" will join together and spin together a new legend...

At the age of sixteen Ryo Narushima was a genius and looked to have no trouble of getting into Tokyo University and joining the elite of society. However, that summer something cracked inside Ryo's head. With a small knife he brutally murdered both of his parents only leaving his sister alive and cowering in a corner. It is at this grotesque incident that our story begins.

Note: The series has been completely written & drawn by Tanaka Akio from ch.61 in Vol.26, which was the first chapter after a long hiatus, and the original author Hashimoto Izou wrote less and less starting from Vol. 4.
The series changed publishers, which lead to a restart of the chapter numbers, with Vol.20.

From Nakama:

1) Shampoo
Two men who are endowed with different pheromones - coworkers Miyake and Koshikawa. Once enticed by that scent, soon these two are drawn close together in a relationship... are these newly born emotions love? Or lust?

2) Relation of promise.

3) Wedding.

4) Sugared words.

5) The future that was born from incandescence.

Between the mountains and the seas, there was a war with the beasts for survival. A man, named Bo Yi, discovered that drinking the beasts blood would grant him powers. Bo Yi traveled the world, recorded these beasts, and wrote the "Shan Hai Jing", he also established «Shang Hai Jing» city, to promote the idea of eating beasts to gain the power to hunt them. But when relations with other countries soured Bo Yi had dissapeared. Since then «Shan Hai Jing» started the pursuit of fame and profit. A young man is a slave at «Shan Hai Jing», however, he has an astonishing ability. The battle with the beasts changed the fate of both this young man and the entire world. (synopsis from SpookyPinata) Original Webcomic http://www.manben.com/mh-shanhainizhan1/