From Tokyopop:
An introspective, character-driven series, Tokyo Babylon reads like a manga version of The X-Files. Its story -- a modern-day fantasy -- follows a young onmyouji (spiritual medium) on his quest to protect Tokyo from evil spirits.
Teenaged Subaru Sumeragi is the 13th head of the Sumeragi clan. Together with his twin sister Hokuto and the mysterious veterinarian Seishirou, Subaru travels around Tokyo, calming the ghosts that threaten the city.

Taken from Wikipedia and Dangerous Pleasure:
After being devastated in the third World War (known as The Third Division), Japan was divided in two. Several years after the end of the war, a crime organization called Vischio has taken control of the destroyed city of Toshima (formerly Tokyo, Japan's capital city), where they are holding a battle game known as "Igura". The main character, a young man named Akira, is falsely accused of a crime. Once arrested, a mysterious woman appears before him, offering him freedom if he agrees to participate in Igura and defeat Igura's strongest man: the king, or "Il-re". The story follows Akira's life in the harsh, lawless Toshima as he fights both to survive and to unravel the mysteries developing around him.

The third entry from the infamous God series of web manga. This is what happens when the creator of "Umbrella Sword" tries to make a love comedy.

Shun Hayasaka is a cross-dresser in high school who secretly enjoys posting pictures of himself in drag online. This earns him several fans, one of whom is Yasuda, a 32-year-old man suffering from depression who has trouble communicating with others. After they meet up in real life and start having sex on a regular basis, Shun is unsure what to do when Yasuda starts expressing more interest in him than just as a sexual partner.

By mimi:
Three short stories. A refrigerator, a camera, and a pair of twins... What do they all have in common? A little darkness and obscurity never hurt anyone...

[From Translation Texts]: Sinners are those who have committed unforgivable sins and are given the mark of thorns after they die. Sin Eaters are those who take the sins and punishment of sinners so they will not go to Hell. Rukiko, a simple village girl, wants to protect Raika, the Fire of God, and the treasure of her beloved village, from Gaii, a Sin Eater who wants the chance to become sinless again. After hearing how Gaii became a Sin Eater, however, Rukiko's feelings change, but Angel Musa, the servant of God who brought her mother to Heaven, tells her not to sympathize with Gaii, and that it is the will of God. Whom can Rukiko trust?

A collection of shorts by Byungjun Byun, artist of young sensible works on the life in the city, including "Princess Anna" and "Run, Bonggu". Many included shorts have received renowned awards from Korea and Japan.

A story of three childhood friends - Colo, Cookie, and Naomi - who grew up in a sleepy backwater town on an uncivilized planet. They struggle to get by while holding on to their dreams of leaving town and finding a better life but can their friendship endure the tests of time? Can it withstand invading armies, broken dreams, conflicting ambitions, divided loyalties, jealousy and even betrayal?

From Yen Press:

Twelve years after her loved ones were brutally murdered at the annual family meeting, Ange Ushiromiya, now eighteen, is the sole heir of the Ushiromiya family. Ostracized by her peers, Ange seeks companionship in the pages of a diary left behind by her cousin, Maria. The diary offers a precious glimpse of Maria’s world-her struggles at school, her friendship with stuffed-lion Sakutarou, and her fascination with magic. It’s as if the diary contains the last remnants of Ange’s dear cousin…and an opportunity for Ange to discover the magic within herself…

Question Arc
1. Umineko When They Cry Episode 1: Legend of the Golden Witch
2. Umineko When They Cry Episode 2: Turn of the Golden Witch
3. Umineko When They Cry Episode 3: Banquet of the Golden Witch
4. Umineko When They Cry Episode 4: Alliance of the Golden Witch

Answer Arc
5. Umineko When They Cry Episode 5: End of the Golden Witch
6. Umineko When They Cry Episode 6: Dawn of the Golden Witch
7. Umineko When They Cry Episode 7: Requiem of the Golden Witch
8. Umineko When They Cry Episode 8: Twilight of the Golden Witch

The side story arcs are:
- Umineko Biyori
- [m]Umineko no Naku Utage ni: Tea Party of the Witches[/m]
- Umineko no Naku Koro ni Episode X
- Umineko no Naku Koro ni Tsubasa
- Ougon Musoukyoku
- Umineko no Naku Koro ni Shi: Forgery of the Purple Logic

Based on the visual novel of the same name. In 1986, between October 4th and 5th, members of the Ushiromiya family gather on the secluded island of Rokkenjima to discuss the division of the family's massive fortune upon the impending death of the family's head, Kinzo. However, when a typhoon traps the eighteen people present on the island, six people are mysteriously murdered. The remaining people struggle to survive as the murders continue, supposedly by the will of the legendary Golden Witch, Beatrice.

Other manga:
+ Triage X manga
+ Sidonia no Kishi manga

From Aerandria Scans:

"The moment you open the letter, you will be cursed. After reading the letter, you have to make two copies and send it to a close friend within 24 hours."

Everyone knows what it's like to pass notes in class. People carelessly write about things like love or gossip. One day, everything suddenly turns out evil...

From Nakama:

Toma and Miyako were raised in the same orphanage. From the moment they met, Miyako has been unable to repress the impulse to soil Toma's beautiful hands. Sadistically embracing Tom is the proof of profoundly sweet love. What awaits the two who wound each other and lick each other's wounds!? The hard Eros of madness and pure love! The forefront of forbidden SM!

From Storm in Heaven: Koizumi Kanna is infatuated with the man who came to the restaurant she works at and ordered a burger with no onions. Little does she know, Toujou Ren is interested in her as well, but for a different reason. Kanna just so happens to be the mirror image of a woman he knew a very long time ago. It is for that reason that he saves her when she nearly dies in a car accident. But the life he gives Kanna is far different from the one she lived before, and she's not certain it's the kind she wants...

1-4) Beautiful, Beautiful, Beautiful
After the break-up with his girlfriend, Kou is left very upset, which is when he meets Akio, Mai's brother. The two of them don't exactly hit it off, but there's a strange kind of attraction that keeps drawing them together.

5) White Fingered Demon
Junior is the son of an Irish mob boss in 1930's America. His father's lieutenant, Leonard Lang is like an older brother to him, but as Junior gets older his feelings for Leo are beginning to change.

Welcome to the future, in S.E. 156. Thirty years before our story begins, an ace space pilot by the name of M2 Rimstein was put into an experimental cold sleep until such time as he would be needed.

That time is now. He is unfrozen and put in command of the Dance Mania unit of three superb pilots, though two are rookies: Stellasta von Argyll, Malloy Chihaya, and Cloud Neelsen. Accelerated training commences, and new ships and gadgets are brought out so that they will have victory over their enemy.

Unfortunately, things go awry fairly soon when M2 is captured and brain-washed by a planet which sends him out to fight for the enemy. Malloy at first refuses to fight his commander, and then does so with the conviction that he can bring him home to the Great Carrier.

Bringing him home may be easy, but regaining his mind?

from Translated Treasures

Kominato Riku is a high-school student who aims to be a game designer. The girl next door is his childhood friend, Haju, who is in love with him, but he has fallen head over heels for the school idol Riko. And lastly, there is the transfer student, Nodoka. With that all said you’d think this is the start of some love-comedy harem, but a rumor spreads that Nodoka's received a message that says, “you will die soon”. Riku and the gang’s fate will change in a major way. Who will live, and who will love?

Collection of short stories, from 1979-1995, including;

- SOS! DAITOKYO TANKENTAI
- RUN
- SPEED
- NEKO HA YOKU CHOPO NI KAETERUKU
- ABUNAI! SEITO KAICHOO
- HOOMONSHA
- SUN BURG HILL NO OMOIDE
- EIYOO MANTEN episode I
- EIYOO MANTEN episode II
- MADOROS KUN
- SUKIYAKI
- NIGHT FLAMES
- Homonsha (VISITORS)

A short stroy about a hikikomori and two men.

Two elementary school pupils, a girl named Marin and a boy named Satoru, fall in love and are blessed with a rather unorthodox child which happens to be a robot. This robot is called Shingo and the story recounts how its mind develops and how it travels the world in pursuit of its ‘parents’ whom it has never had a chance to meet.