The multiverse, she said, was like an old library whose shelves were packed with books arranged by a cataloguing system that ranked them according to similarity, each book containing within its covers a story that varied only slightly from the stories of its immediate neighbours, but by increasing degrees from those of increasingly distant books.
Here are illusions, dreams and imaginations in the form of science fictions, essays, computer arts and algorithmic music. Each of them has its unique rules and settings. Those multiverses are mainly maintained by Wei Tang.
If you are looking for real stuff, go to Wei in the Real World.