Boogiepop wa Warawanai, Baccano! Recommendations
Though not similar in content, Boogiepop and Baccano share a similar dark, urban-magical atmosphere and web-like plot which reveals itself slowly through each episode in the fashion of Pulp Fiction.
Both involve stories where a large cast of characters link together through a series of separate plots.
Both of them have large cast of characters. Also, the full story is divided in different pieces through each episode...like a puzzle. And both have suspense, mystery, and really gory scenes.
Both are very enjoyable shows with a confusing, non-linear plot and lots of blood and nasty violence-though the violence in Baccano is a lot more graphic.