This is a list of manga that I believe is yaoi. Found here:
[link]After I win
Ai No Kusabi 1 (novel)
Ai No Kusabi 2 (novel)
Alcohol, Shirt & Kiss
All Nippon Air Line: Paradise At 30,000 Feet
Alone In My King's Harem
Aya: Yamane Ayano Artbook
Beyond My Touch
Black Knight 1
Black Knight 2
Black Knight 3
Body Language
But I'm Your Teacher
Caine 1
Camera Camera Camera 1
Camera Camera Camera 2
Can't Win With you 1
Close The Last Door! 1
Constellations In My Palm
Crushing Love
Cute Beast
Dark Dreams Artbook
Dark Prince 1
Dash!
Dear Myself (1)
Delivery Cupid
Don't Blame Me 1
Don't Say Any More, Darling
Dost Thou Know
Duetto
Eerie Queerie 1
Eerie Queerie 2
Eerie Queerie 3
Eerie Queerie 4
Everlasting Love
-Fake- 1
-Fake- 2
-Fake- 3
-Fake- 4
-Fake- 5
-Fake- 6
-Fake- 7
Fake Fur
Finder Series 1: Target in the Finder
Freefall Romance
From Up Above
Gakuen Heaven
Gakuen Heaven Art Book
Garden Dreams
Gerard & Jacques 1
Gerard & Jacques 2
Gorgeous Carat Galaxy
Gothic Yaoi Art book
Gravitation 1
Gravitation 2
Gravitation 3
Gravitation 4
Gravitation 5
Gravitation 6
Gravitation 7
Gravitation 8
Gravitation 9
Gravitation 10
Gravitation 11
Gravitation 12
Gravitation EX 1
Gravitation: The Novel (novel)
Gravitation: Voice Of Temptation (novel)
Great Palace High School
Hate To Love You
Hero Heel 1
Hybrid Child
Ichigenme 1
Ichigenme 2
II Gatto Sul G 1
I'll Be Your Slave
I'm Not Your Stepping Stone
Invisible Boy 1
Invisible Boy 2
Invisible Love
Jazz 1
Jazz 2
Jazz 3
Jazz 4
J-Boy 1
June Pride
Junjo Romantica 1
Junjo Romantica 2
Junjo Romantica 3
Junjo Romantica 4
Junjo Romantica 5
Just My Luck
Ka Shin Fu
Kissing
La Vie En Rose
L' Etoile Solitaire
Little Butterfly 1
Little Butterfly 2
Little Butterfly 3
Little Cry Baby
Little Darling (novel)
Lost Boys
Love Bus Stop
Love Is Like A Hurricane 1
Love Is Like A Hurricane 2
Love Is Like A Hurricane 3
Love Recipe 1
Love Share
Love Training
Loveholic
Lovely Sick
Lover's Flat
Lovers In The Night
Man's Best Friend
Maybe I'm Your Stepping Stone
Melted Love
Menkui! 1
Menkui! 2
Menkui! 3
My Paranoid Next Door
Necratoholic
Not Enough Time
Only The Ring Finger Knows
Only The Ring Finger Knows: The Left Hand Dreams Of Him (novel)
Only The Ring Finger Knows: The Lonely Ring Finger (novel)
Only The Ring Finger Knows: The Ring Finger Falls Silent (novel)
Ordinary Crush 1
Ordinary Crush 2
Othello
Our Everlasting 1
Our Everlasting 2
Our Kingdom 1
Our Kingdom 2
Our Kingdom 3
Our Kingdom 4
Our Kingdom 5
Passion 2
Passion 3
Passion 4
Pet On Duty
Pleasure Dome
Prince Charming 1
Reflections: The Artbook of KOSEN
Return To Scandalous Seiryo University (2)
Rin! 1
Rin! 2
Rin! 3
Rose Of The Rhine
Same Cell Organism
Scandalous Seiryo University (1)
Seven
Skyscrapers Of Oz
Solfege
Spell
Star
Stolen Heart
Sunflower 1
Sweet Revolution
The Art Of Loving
The Crimson Spell
The Day I Became A Butterfly
The First Stage Of Love
The Lily And The Rose
The Moon And The Sandals 1
The Moon And The Sandals 2
The Paradise On The Hill
The Sky Over My Spectacles
Time Lag
Truly Kindly
Vanilla 1
Vanilla 2
Wagamama Kitchen
~Waru~
Wild Adapter 1
Winter Demon 1
Winter Demon 2
Winter Demon 3
Words Of Devotion 1
Words Of Devotion 2
World's End (2)
Yakuza In Love
Yebisu Celebrities
Yellow 2
Yellow 3
Yellow 4