Haibane Renmei (灰羽連盟) is a 2002 anime about a community of young women in a fictional afterlife. The first half simply follows their day-to-day experiences, while the latter half focuses on the characters coming to terms with their deaths and finding ways to move on. The show is very special to me, and I've spent a lot of time thinking about it!
Yoshitoshi ABe, who wrote Haibane Renmei, published a series of eight scriptbooks accompanying the show. They contain the full scripts for all thirteen episodes, along with extensive commentary, concept art, early drafts, and various other fascinating little bits and pieces. They are long since out of print and very difficult to acquire, so I have made sure to scan them all to ensure they are not lost to history.