Yume Nikki (2004-2007) is a game made with RPG Maker 2003 by Kikiyama. It consists in exploring a dream world and collecting effects, having no story or dialogue.

Official

Kikiyama's site
Vector.co.jp
Dream Diary
Manga
Novel
Interview with Kikiyama by Toby Fox
Older versions

Fan material

Yume Nikki Online Project
Wiki
Uboachan
Gobou
Madotsuki's Closet

Most famous fangames

Yume 2kki
.flow

Other

REX Yume Nikki (1993)
Ancient Paracas Poncho with "Madotsuki"

art by Pogney