Related Series:
Horitsuba Gakuen (Prequel)
Tsubasa: Reservoir Chronicle (Adapted From)
xxxHoLic (Adapted From)

To honor CLAMP's 15th anniversary, CLAMP no Kiseki: The Ultimate Collection features full-color pages, exclusive material, 6 pages of new, never-before-seen manga, and limited-edition collectible figures!

From Tokyopop:

Drawing on CLAMP's own personal experiences, The One I Love provides insight both into the creators' own lives, and into the oft-elusive concept of Love itself.

This intimate collection of short stories and essays doesn't skirt issues at the heart of the matter such as insecurity, honesty, distance, independence, age, and - of course - marriage.

This one-volume anthology comprises 12 individual stories, each of which consists of seven pages of manga and two pages of prose.

Hikaru Shidou, Umi Ryuuzaki, Fuu Hououji are on a field trip to the Tokyo Tower with their respective schools. The girls are blinded by a flash of light and hear a voice calling for the Legendary Magic Knights to save Cephiro. They fall through the sky into another world, Cephiro. Once there, they meet Master Mage Clef. Clef explains, "In Cephiro, one's will has the ability to change reality for better or worse. The dark fears in people's hearts become monsters, while a well-intended wish can do miracles. One person, the Pillar, whose will is stronger than anyone else's, is responsible for maintaining through her prayers the well-being of Cephiro."

In the first story arc, the current Pillar, Princess Emeraude, has been captured by her high priest, Zagato. The three girls are charged with the task of saving the Princess.

Magic Knight Rayearth follows Hikaru, Fuu and Umi along with their friendly sidekick, Mokona, on their quest to save the mystical planet of Cephiro.

Clover is primarily about a young girl called Sū. In the cyberpunk world that she inhabits, the military conducted a search for gifted children nicknamed "Clovers", who seemingly have the magical ability to manipulate technology. Demonstrations of their powers include teleportation and summoning weapons from thin air.

Classified according to how powerful they are, the children were then tattooed with a symbol of the Clover Project, with the number of leaves on the Clover indicating their power. To date, Sū is the only "4-leaf Clover" discovered. Along with other "Clovers", Sū was imprisoned to prevent her contact with other humans, as the government feared that she might develop feelings and be used as a weapon to jeopardise the country's national security.

Being isolated from the rest of mankind, Sū craves for company, and as for her only wish, she asks to visit "Fairy Park." Her escort is Kazuhiko, an ex-military soldier who has been forced to undertake the task. It is later revealed that Kazuhiko and Sū are connected through their mutual friend Oruha

Kazahaya is rescued from freezing to death on the streets of Tokyo by another young man his age named Rikuou. Now Kazahaya rooms with him (who he dislikes for his attitude, even though he's grateful to him for saving his life) above the drug store they both work at, Green Drug. Both work for the mysterious store owner Kakei, while putting up with Kakei's "friend" Saiga, who is always teasing them. The strangest thing about Kazahaya's job is that he and Rikuou are often sent on "extra jobs" by Kakei ...which are different and stranger every time, be it to retrieve a book or a girls' school uniform. Kazahaya always accepts the "extra jobs" so he won't end up without money and on the streets again...but he really wonders what the purposes are of these "extra jobs".

-On Hiatus

Sakura Kinomoto was just an average 4th Grader - loved P.E., hated math - until one day, while looking through her father's library, Sakura found the Clow, an enchanted book designed to hold a set of magical Clow Cards. But when Sakura opened the book, it was empty. Talk about disasters!! Keroberos, the Creature of the Seal, emerged from the cover of the book and told Sakura the cards must be returned to the book. "If the cards aren't in the book, they come to life and do evil!" Kero formed a contract with Sakura making her a Cardcaptor and together with Sakura's best friend, Tomoyo, they embark on a mystical journey to capture all the Clow Cards before the Cards can wreak chaos and destruction

From Clamp no Lumiere:
Murikuri is the story of a popular pig, a pervert santa claus and his high school girlfriend, nice aliens and many more... It does not make sense and I would advise you to not try to understand it. Murikuri is to CLAMP what special halloween is to the Simpsons, a collection of short gags.

From Tokyopop:

Kentaro and Takeshi are two freshmen who are periodically called upon to transform themselves into monster-battling superheroes, complete with capes and armor... but there's much more than meets the eye...

Akagi's one-shot drawn by CLAMP

A new story begins with Watanuki and Yuuko, while guests wishes are granted.
(Source: LuffyNoTomo)

Akira - who later appears in the CLAMP School Detectives manga series - is a dapper, debonair young thief-for-hire who becomes the object of 5-year-old Utako's affections. (Source: Tokyopop)

Ukishima Shrine is located in an old, picturesque lakeside town. Shrine maiden Kisaragi Saya lives there along with her father, Tadayoshi. By day, she lives the life of a normal high school student at Sanbara Academy. By night, she hunts the Old Ones. Possessing supernatural physical prowess, the Old Ones prey on humans, and only Saya has the ability to defeat them.
(Source: AniDB)

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.

One night, a man named Shuichiro Kudo comes across a tiny angel trapped on a tree branch. He frees her, and in return she offers to grant him a wish. However, Shuichiro is a successful doctor, with a home and everything he needed; he declined the angel's offer. The persistant angel, named Kohaku, refused to give up, stating that "some wishes cannot be fufilled by oneself." After settling in at Shuichiro's home, Kohaku reveals her mission to track down the Angel Master of Wind, Hisui, who has abandoned heaven. That is, if her devil rival and his two catty servants would let her leave long enough to do so...
(Source: ANN)

Hinata Asahi is a high school student who lives alone with only her teddy bears to keep her company. Her life becomes much more exciting when the handsome Shirou Asou, moves in next door -- not only is he really cute (even if much older), but he's also her new teacher! Hina has a bit of a crush on Asou-sensei, but when the older man seems to take an interest in her as well, is it a forbidden love or something else? (Source: Tokyopop)

Hideki's just like every other guy in the 22nd century. He just wants a good job, a good car, and a sexy robot girlfriend to call his own. Until he lands a job, he'll never be able to afford his own 'Persocom' companion. Hideki's luck changes when he discovers Chi--an adorable but seemingly stupid Persocom--tied up in a pile of trash. His first robot companion turns out to be a lot more responsibility than he expected, and she gets him into quite a few embarrassing situations. It's 'boy-meets-girl' for the cyber age. (Source: Tokyopop)