Anything by
Masamune Shirow is usually worth reading.
In addition to
AppleSeed, I would also check out Ghost In The Shell, at least the original manga, and Black Magic.
There are two anime movies based on AppleSeed. The second one is better, but both pale compared to the manga and should be ignored until you have read it. The psychological, philosophical, and other aspects that made the manga so engrossing are lost in the animated films.
Same with Ghost In The Shell. Avoid the movie, though Ghost In The Shell: Stand Alone Complex is decent. I haven't read the later Ghost In The Shell manga in their entirety, but PM me if you want a link to where you can order the original Ghost In The Shell manga in one volume, translated to english but without the censorship of the original version. Some scenes were butchered. I still scratch my head over the violence that is allowed in media while nudity and sex freaks people out. :laugh: I would post the link here, but the site has some NSFW merchandise for order.
Black Magic is another manga worth reading. Once again, it has an anime movie loosely based upon it, but it is like reading one scene of Hamlet and expecting to comprehend the entire play from that. The movie is called Black Magic M-66. The manga is more of Shirow's excellent dystopian science fiction, again delving not only into the science but also the psychological and philosophical aspects of it.