The 3rd story is definitely this one:

The Light at the End by LikeABlueThread Reviews
In contemporary Tokyo, where demons are stigmatized and must hide their identities, two lonely souls find each other on a train. MA for explicit sex. NOW COMPLETE!
Rating: MA - Universe: Alternate - Status: Complete - Category: Chapter Stories - Genre: Friendship, Romance - Updated: 05-24-12 - Created: 05-18-12 Chapters: 12 - Reviews: 117 - Words: 44,371 - Reads: 88,539 - Anonymous Reading: Yes

www.dokuga.com/fanfiction/story/7374/1

Not sure about the others, sorry.

Searching for two stories [or possibly one?]:

The first, Kagome is back in her time. She works at a museum and is in charge of inventory. One night, she finds a worn statue of Sesshoumaru and enlists her mother to take him home. They [or he alone] goes back to Sengoku Jidai to take back his ancestral home. I'm pretty sure Rin is dead here because he was overthrown and turned into stone the day he visited her grave.
This is definitely not Tales from the House of the Moon.

The second story... I'm not sure if I'm remembering parts of the first. But, in the end Kagome and Sesshoumaru travel via boat to Europe to figure out how European spirits and demons escaped death by human hands. Kagome had the ability to create monsters out of paper and she could change Sesshoumaru's appearance with enchanted beads. There was a scene where he was enchanted and they were on a boat. A witch in a bird's body [possibly an albatross] was eavesdropping on them. I think there was another scene where she was reading papers from a miko about the migration of demons and the miko turned out to be her in the past-future.

They went to the southern palace that was ruled by kitsune and ended up creating a network of portals for demons to maneuver in and out of.

I have a feeling that I'm remembering the beginning and end of one story, but if not, I would love the name of both.

The 3rd or 2nd story is set in future AU. Sesshoumaru and Kagome meet on a train or bus. She's reading a book about ancient weapons and they become interested in each other. Demons still exist, but they have to hide their heritage with bracelets. Ungai is outing them and killing them and tries to do so at a daycare Shippou and Rin attend. In the end, the demons take their bracelets off and reveal themselves.

I would love to read other stories by this author if anyone remembers this fanfic.

I believe the first and second one are the same story.

Unsung Silence by Draconic Ban-Sidhe
A year after the Shikon was restored, she's stuck at home. Kagome wants nothing but to return to the past... until the past comes looking for her, in a most unexpected way. Can Sesshoumaru and Kagome help each other out.... or not? SxK
Rated: M, Angst/Adventure, Chapters: 48, Complete

Ooh thank you. I had a feeling that I was remembering 2 stories instead of 3. Thank you both so much.

You're welcome.