Higurashi no Naku Koro ni: Kataribanashi-hen Comic Anthology EX.
An officially published doujinshi anthology series for Higurashi no Naku Koro ni, created by several artists based upon reader submitted stories, and complied into volumes by Ryukishi 07.
The first two volumes draw their primary inspiration from question arcs, while the latter volumes draw inspiration from the answer arcs.
Serialisation information and a (currently incomplete) chapter listing can be found under More Info.