 If you liked
Noir
|
 ...then you might like
Pandora Hearts
|
Aside from having had Yuki Kajiura work on their respective soundtracks, both shows have a similar set up.
Both shows are centered around group of people connected by a mysterious past and powerful secretive organizations, with characters who struggle not only to find themselves, but with the revelations that are found.
Although Pandora Hearts is set in a fantasy world, and Noir is set in a modern venue, both are very good mystery dramas. We'll just have to hope for a second season to continue to flesh out Pandora Hearts story (unless you read the Manga, of course).