From Tokyopop:
A smoke-filled alley in Chinatown harbors Count D's Pet Shop. The pets sold here aren't your everyday variety and the Count prides himself on selling Love and Dreams in the form of magical creatures that come with an exclusive contract. But buyers beware. If the contract is broken the Count cannot be held accountable for whatever may happen. A fascinating and macabre look into the very soul of human nature.

From Impossibility:

Morisawa Kai and Sato Tatsuki are best friends. However, unlike Kai, Tatsuki is completely unreliable, lazy, and ill-tempered. One day Tatsuki takes Kai out driving in his new motocycle only to get into a bad accident that leaves Kai dead. However, Kai's spirit ends up in a body of a girl named Fujii Marika. After seeing how cold and unaffected Tatsuki as well as everyone else was after his death, Kai transfers to his previous school in which he starts noticing flaws to Tatsuki's cool mask...

The Continent of Song is in chaos. The sinister secret society known as Demon Card is using the power of Dark Bring to destroy everything in their path.

The only things capable of stopping Dark Bring are the Rave stones. Unfortunately, the Rave Stones were scattered around the globe in an explosion 50 years ago, so now they must be collected by the Rave Master in order to stop Dark Bring once and for all.

This new task has been given to Haru Glory, a sixteen year old boy from Garage Island.

The World's fate now rests on the new, young Rave Master.

From TokyoPop:

After 1000 years of peace, the wolf god Fenris Fenrir has been reborn. She seeks to find the reincarnation of Balder, the most beloved God, as the land of Midgard sinks further into anarchy. They are both key players in the coming of Ragnarok, the time when fate and free-will shall come into conflict as the very nature of the universe is forever redefined.

RilleL:
Based on norse mythology, ragnarök is the term for the end of the world. Christian equivalence would be the last judgement.

The popular Korean MMORPG "Ragnarok Online" was based on this book.

From Tokyopop:
The story of a detective who becomes involved with a young boy with telekinetic powers and his violent sister.

The manga's main characters are featured in another series by the mangaka, FAKE, as supporting characters in Vol 3-5.

[From AnimeWaves]:

Chinami was born with psychic powers. She has always wanted to join the Psycho Police Force. However, she doesn't know how to control her powers, so she failed the entry exam. However, after being saved from a psychic criminal, she joins the Psycho Merchants instead.

[From Aku-Tenshi]:

In the center on a metropolis city lies a small, shaky-looking house. A normal... Okay... Not so normal high school student, Sakura Tetsu (and his family), who works day and night relentlessly to support his family's living expenses, lives there. All is normal until one day, people from the future, alien pirates from outer space, appear. The underground kingdom claims Tetsu's land. Will he prevail in protecting his own land? Or will he surrender his land into many more invaders to come? Yes... Weirdness and insanity ensues!

From Nagareboshi Manga:

The student council is full of strange, quirky people with clashing personalities. One person in particular, Tsubaki Kiyoi (nicknamed Tsubakiyo), has a special talent that only one other person knows about-- when she touches someone, she can access their thoughts and memories. But because of this talent, she is very introverted and damaged inside. Can she overcome her fear of coming in contact with other humans, and take control of her power?

1) Saikou no Kimi
All begins when Soga Naoaki went to complain to the president of the student counsil, Yoshizumi Sekai, about the reducing of his volleyball team's bookings. By coincidence, Naoaki becomes the vice-president of the student counsil because of the health of the current one. He and Sekai don't get along, but what happens when they have to organise the school festival? Also found in Koibito no Namae

2) Kimi to Boku no Itsu Pobun
Oneshot also found in Renai Jikaku Shoujou.

3)Kimi ni Ai ni
Oneshot also found in Takaramono.

4) Afterword

From Yen Press:

Millennium Academy is a school where elite vampires are trained to maintain balance in a world where humans and vampires, who possess far greater physical strength than their human counterparts, coexist. And commuting to this school is Aldred, the most distinctly un-vampire-like vampire to be found in the entire institution. But when Al encounters Kei, a human transfer student to the school, their destinies become intertwined, and the fate of their world as they know it comes to lie in their hands!

Classic short stories from Takahashi Rumiko. Many are comedies.

Volume 1:
"Fire Tripper" (fantasy, romance)
A gas explosion sends high school girl Suzuko and toddler Shuu 500 years into the past. But she lost Shuu on the way, and as a result, Shuu ended up in the past 10 years before her, and is 15 years old when Suzuko arrives.
"Maris the Chojo" (comedy, sci-fi)
A destructive alien policewoman sees a kidnapped quadrillionaire as her ticket out of debt.
"Those Selfish Aliens" (comedy, fantasy)
Aliens, the government, and fishmen implant bombs in a poor paperboy.
"Time Warp Trouble" (fantasy)
Warriors from feudal Japan inexplicably pop into a high-school classroom.
"The Laughing Target" (drama, romance, supernatural, tragedy)
When they were children, Yuzuru Shiga and his cousin Azusa Shiga were engaged. Azusa aims to make sure that Yuzuru stays hers, no matter what, but Azusa also has a dark secret...

Volume 2:
"Wasted Minds (Dust Spot)" (adventure, comedy, fantasy)
Follows a pair of two bickering government agents, both of whom have special abilities. (A five-part mini-series)
"The Golden Gods of Poverty" (gag comedy)
An unfortunate boy's scientist parents try to use him to make money, but they only succeed in contacting the Seven Lucky Gods, who happen to also be broke.
"The Entrepreneurial Spirit"
A woman leads seminars for a get-rich quick scheme.

Volume 3:
"That Darn Cat" (slice of life)
Takahashi Rumiko remembers having to take care of her neighbor's cat.
"When My Eyes Got Wings"
A couple befriend a sickly child with a secret and his destructive pet bird.
"Wedded Bliss" (comedy, romance)
A wedded couple can only let out their tension from working all day by fighting with one another, until their neighbors threaten to have them moved.
"Sleep and Forget"
A girl relives a past life involving her lover and an evil witch back from the dead in the form of a dog.
"A Cry for Help"
A fairy gives a boy a frightening split personality thanks to the wind-up key she inserts in his neck.
"War Council"
Student councils go to war with one another over a stamp.
"The Face Pack"
A man can change his appearance at will and leads a "masters of disguise" club.

more info here.

Compilation of short stories:

1) 1000 Years, I Love
Hakua is sent into the mountains by the village to kill a ferocious tiger that has been attacking villages. The tiger, mistaking him for a girl, drags Hakua into the mountains to become his mate. Love soon blossoms as Hakua must teach this half human creature the meanings of his new found emotions.

2) 1000 Years, I Love Extra
Their love going strong, Hakua decides to go back to the village. Naturally Youko tags along and runs into some trouble in the human world.

3) Lying Words Honest Kiss
A slave merchant Kouhaku steals a beautiful boy Enji to sell him to a public house. Little did he know that the boy wouldn’t mind at all.

4) Fallen Warrior
A doctor’s apprentice Suiki finds a wounded samurai in the forest and takes him to his home to treat. The samurai Genka is really bad-tempered and the boy has bad history with samurai.

5) The Flower of Love
Story about an artist Sekka and a beautiful boy Joka he saves who later comes to serve as his model.

6) The Path of Pure Love

Shiina Momose doesn't believe in fortune telling and the occult, but for some reason, she can destroy anything with a touch. One day while on her way to school, a young man approaches her and claims to be a God. Furthermore, he believes that he was guided towards her and for that reason he has become convinced that she should become his first follower! Naturally, Momose refuses; but when strange things began to happen... she can not do something about it!

As a descendent of the famous exorcist, Abe no Seimei, Yuuichirou has always been able to see ghosts. Yuuichirou, as a child, was proud to be a son of the Seimei Shrine and wanted to follow in his father's shoes and become an exorcist until he's bullied by Ishida in elementary school. Now, as a teenager, Yuuichirou has lost his faith in Seimei. Can a visit from Abe no Seimei, himself, restore Yuuichirou's faith and close the rift between father and son?

Welcome to the cursed island of Shina Dark. This island is called home by the dark lord Exoda C. Claw AKA Satan. He's as powerful a being as you could ever hope to meet. Feared and hated the world over for the infinite amount of atrocities he's committed. He's.....actually a really nice guy who just wants to chill out around the castle and relax... After a month long nap he awakens to find that the rest of the world has made up another ridiculous rumor and blown it way out of proportion and that has caused his little island to be crowded with a thousand beautiful girls meant to be his mistresses/sacrifices. Worse yet is that since they have set foot on his island they are all believed to be cursed and are now shunned by their homelands. What’s a couch potato Satan to do with 1000 women who wont leave? Who can say?

From Operation Boredom:

During an eclipse, demon Lord Exoda. C. Crown was revived. He is supposed to bring chaos and destruction to the world. The world is panicking, and as a sacrifice to the demon lord, they decide to send 1,000 girls to the demonic island, Shina Dark. However, in Shina Dark, all the legends are lies. Exoda does not sleep with 10 girls a night, and keep the others prisoners. He does not lust for girls, he does not want to cause mass destruction - he simply wants to live in peace. So when 1,000 girls suddenly show up in his island and refuse to leave, what will happen to Exoda, who simply wants to be left alone?

From Tokyopop:
Renji is one of God's most powerful but overly violent angels. As punishment for going too far in the last battle against the demons, Renji is sent to Earth, where he must save 10,000 souls. Only then will he be allowed to return to heaven!

[From Condensation]: About three girls who transform into rabbits to save people from the Stress Monsters.

Koyuki has the power to see the future, but she can only see the unfortunate things that happen to people. Until the day she meets Umehachi, a high school senior... Fanservice, mayhem, and hilarity ensues.

1. Teirui Makura
Popular honor student little brother, Yuua, and his kind older brother, Seigo. One step ahead in the puberty department, Seigo tries to put a little distance between him and his cute little brother. However, the innocent little brother is to blame with his defenseless skinship. Finally, Seigo's lust consumes him and he can't endure anymore. Once Yuua accepted that idea, his desire to be attached to his brother grew stronger every day.

2-3. Finger Biting, The Moon's Colorful Person

4. Choroize! Jigoku
A constant failure at job interviews thanks to his scary expression, Danda's employment agent sends him on a rather unusual assignment.

5. Loup-Garou Gokou extra
A short extra to Loup-Garou Gokou, chapter 9 in Hide and Seek.

6. Natsu ni Shini Yuku Monogatari (Dangerous Symphony)
Rock and Homero live in a world, where all kinds of laws restrict people and you can get arrested for the simplest things. Naturally, being love with another man is frowned upon.

Collection of short stories, including:

The World Cup 1962
A somewhat surreal take on a Japanese child's position in the Cold War.


Metropolis
Kenichi, a 20-year-old man, took an entrance exam into college, but fails it for the third straight year. That day, he came across a traffic accident where it appeared that a giant robot went crazy and disrupted the flow of traffic. He meets a person by the name of Mitchy who is trying to save the remaining survivors. Who is this Mitchy person and what does this "Red Party" fraction have to do with the giant robot?