From Wings of Yuri:

A high school story about the a love triangle between 2 girls and a boy.

Fuuka likes Riri. Riri likes Itta. Itta likes Fuuka.

This is not a typical love triangle, though!

Collection of adult comedy short stories.

[From MangaScreener]: Shigeo is a high strung elementary school student living with his mother. His only concern is getting ahead in life by doing well in school. He despises his father Hanao (who is separated from them), who's an idealistic free spirit and kid at heart infatuated with the sport of baseball. Shigeo's mother forces Shigeo to take time to visit his father and so begins Shigeo's lessons that there's more to life than excelling academically (courtesy of his very childish father).

The young Saori-chan visits her cousin, asking about sex nervously after just learning that her friends had done it.

Note: Nothing of the sort actually really happens at all.

From Solaris-SVU:
Shingo Chiryuu isn't much different than any other guy except for one thing... He's afraid of girls. Now he finds himself surrounded by girls, including the one whose attack originally instilled the fear in him, as he attempts to cure himself of his gynophobia.

Shingo Chiryuu isn't much different than any other guy except for one thing... He's afraid of girls. He was attacked by an overweight girl because she was turn down from confessing to him, which caused him to develop a fear of women, seeing them all as "dinosaurs". Even despite all his efforts to get away from the girls, they seem to always found their way to him, making trouble along the way. Now he finds himself surrounded by girls, including the one whose attack instilled fear in him, as he attempts to cure himself of his gynophobia.

For his twentieth birthday, Shizuka chooses to go to a hot springs alone. To his surprise, he also ends up seeing his first naked woman... a passed out drunk girl. Soon afterward he enters college, and his friend from high school convinces him to join the female dominated travel and hot springs club. Amazingly, the girl he saw naked, Ruka, is also a member of the club! Now he must interact with his club more or less normally, and pretend he doesn't imagine Ruka naked every time he sees her. He is determined that his embarrassing secret never be made public!

The princess has been captured by the evil demon king and her father offers her hand in marriage in return for her rescue! But things aren't all what they seem...?

18-year-old Mai Sugimoto is a college student starting this year. She was looking forward to the "college life," but she ends up living with two women because of a realtor's mistake. Furthermore, they are all 18-years-old and share the exact same name, Mai Suigimoto. Hence a life story of three Mai(s) full of fun and erotic excitement begins. Can these three girls get along?

Ono Matori is a high-school student who is secretly a successful erotic manga author. He has recently found new inspiration for his work from his neighbors and classmates, the Hikasayama twins, Haruna and Wakana. Both Haruna, the cheerful and active half, and Wakana, the cool and collect one, both fall in love with Matori. He unwittingly agrees to date both of them both for research purposes and personal interest. Their love triangle will help Matori with his erotic manga storyline but how will his life change back in the real world?

Oomura Takeshi is one unlucky fellow. He has has this case of bad luck ever since he was little. One day, while on his normal runs with bad luck, he meets an Angel named Elle, and he finds out that his father wished the curse of bad luck upon him. Takeshi has the oppurtunity to pass on the curse, but accepts it to save a young girl. For his noble act, Elle becomes human and lives with Takeshi to protect him from the curse, which is something Takeshi isn't particularly happy with.

From Solaris:
After spending half a year abroad, Kinosaki Yuichiro is in for a shocking homecoming when he discovers that his inventor/scientist father has given his 3 dogs the appearance and abilities of girls. Now he is in for a ton of grief as he tries to cope with these changes.

The official Infinite Stratos Anthology comics.

[From AnimeWaves]:

Saruno runs a bodyguard service company with his assistant, but they hardly have any jobs. One day, a fateful encounter with a girl called Meruo started a whole series of interesting adventures.

Ibusuki Rokusuke is unlucky enough to have a girl who's downright crazy for him. While trying to escape her twisted idea of love, he sneaks into an inn... which happens to be run by a witch who does not appreciate it when people try to stay without paying first.

...oh, and the crazy girl got there before him. Poor guy...

Prequel to Yawara! A Fashionable Judo Girl.

Published in an anthology of 4 stories about Jigorou and 2 other stories completely unrelated to Jigorou or Yawara. One of them is called A Bat & 2 Balls.

Mezuki is a former firestarter for the Lord of the Underworld. After accidentally burning down the Lord's palace, she is reassigned to Earth to keep tabs on humanity's sinning. She takes an interest in a particularly evil-looking man...

1-6. Koi wa Misoji o Sugite kara
Uehara Sakura, a 30-year-old office lady, is on a date with her 22-year-old kouhai from work, Yamada Yuu. While Yamada is completely heads over heels for Ueda, she absolutely hates him. Will those feelings hold true when they get to their last destination -- the Love Hotel.

7. Boku ga Seifuku ni Kigaetara

8. Ohikkoshi Bugi

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Twenty-four-year-old Kirara is on her way to her wedding when she is killed in a car accident. However her love for her fiancé is so strong that she is permitted to return to earth as a ghost to see him. But she is sent back 8 years in time, to when she and her fiancé first met. However her own meddling in the past may make her 16 year-old-self turn away from her would-be fiancé.

Volume 1: Kouichi and Mao are childhood friends, but as they enter High School, they become more and more distant. And as Mao becomes more popular and beautiful, Kouichi wishes he could be popular too, and eventually get a girlfriend. Mao decides to help him... (Written by Aymie) Based on a bishoujo game. As per the title, "Various Heroines", each volume of this manga focuses on a different girl Kouichi can eventually end up with when you play the game. So, think of each volume as a story separate from the rest.