Araki Jin, a high school student whose parents are archeologists, finds a lamp in a package they sent him. And guess what happens when he polishes it... The academy's idol, Zadou Sierra abruptly appears dressed in a maid outfit!
(Source: Mangaupdates)

A series of original doujinshi from circle ELEGY SYNDROME.
Yuri Project only scanlated the main story in each volume, which were done by Namori herself. The rest are extra stories from other artists.

The story is set in the same school as Yuru Yuri.
Hiro is an ordinary first-year student who enjoys her quiet school life. One day, she picks up a drawing by Toshinou Kyoko which causes her classmate Aoi to mistake Hiro for the artist. Unable to clear up the misunderstanding, Hiro is persuaded to create a doujin game together with Aoi-chan.
(Source: MU)

A spin-off of the Yuru Yuri series featuring Sakurako and her sisters.

(Please note this is not Yuru Yuri)
Series of yuri doujinshi by Namori bundled together in one book.
Yuri Yuri 1 (Sara and Momoka)
Yuri Yuri 2 (Senri and Aya)
Yuri Yuri 3 (Miwa and Megumi)
Yuri Yuri 4 (Asami and Kawaguchi-senpai)
Yuri Yuri 5 (Yoshino and Tsukasa)
Yuri Yuri after (The afterwards of the first four stories)

Four mischievous girls illegally occupy the former Traditional Tea Ceremony clubroom, in order to create the "Amusement Club." These scamps...who ignore repeated warnings - in direct rebellion with the righteous directives of the Student Council - decide to remain in the room until they finally get off their bums and do something! In this slightly sluggish manga, full of fits and starts, the four girls set off from their homes for a walk together with days full of a little this and that! ♪

(Source: Jmanga)