Concrete Garden
Complete | kotobuki tarako | 2002 released
Um... a bit weird. I agree with the other reviews that the "explanation" didn't make much sense at all. The angel and the kid story was good, though short and a little hard to follow, too.
Specter
Complete | kisaragi hirotaka | 2000 released
A bit too short, I think, for something so involved, but still interesting.
Ginkaku Hakase to Marmot
Complete | ike reibun | 2009 released
I gotta laugh at some of it. Some of those scenes were hilarious. All of them were good, though and I really was worried for a few moments that it didn't have a tragedy tag it was supposed to, but it didn't end up needing one (thank the FSM).
Etowa