Most sites are in Japanese below,but you can find Petit Computer Program and QR codes because they are good at Japanese Petit Computer.
- AOGONDO (by AOGON) - http://www.aogondo.net/PetitCom/
- Bycount Melville no Heya / Petitcom no Hanashi toka (By Bycount Melville) - http://www.geocities.jp/melville515/petitcom/petitcom
- Chikuwa NO LIFE / petitcom at michelan-gelo. (by michelan-gelo.) - http://www.ma.mctv.ne.jp/~miche/ptc/
- Doryoku to Jikan no Mudazukai(Petit Petit 3kyu) / Petitcom Sakuhin - http://damedamepg3q.web.fc2.com/pettitcom_1.html
- eidaht no HatenaDiary (by Eida) - http://d.hatena.ne.jp/eidaht/
- Furiken Modulation / Petitcom Ssakuhin Shoukai (by Rukaka) - http://hrukaka.web.fc2.com/petitcom/
- (Konimiru Katsuragi) - https://www.flickr.com/photos/konimiru/sets/72157633013696475/
- KT.SOFTWARE / Petitcom (by kt.) - http://www.geocities.jp/sp1_ssr/petitcom.htm
- Kouyama no Home Page / Petitcom Program Library (by Kouyama) - http://www1.odn.ne.jp/beni/petitcom/petitcom.html
- Moekabe / Petitcom (by Enuou) - http://www8.plala.or.jp/enuou/petitcom/menu.html
- Monooki@Ogu / Petitcom Seisaku-butsu (by Ogu) - http://www43.tok2.com/home/ogut/puchinko/puchinko.html
- MOT HP / Petitcom mkII (by MOT) - http://motmark3.web.fc2.com/petitcom/
- Mori-chan no Mono-okiba / Petitcom (byMori-chan) - http://jubilo23.web.fc2.com/petitcom.html
- OBONO's Dairy / Petitcom (by OBONO) - http://www.geocities.jp/obono_kun/#petitcom
- Ochame Club / Petitcom Corner (by Ochame na ko) - http://ochameclub.web.fc2.com/petitcom/petit.htm
- Palette Room / Petitco Room (by MAGE) - http://mage.kir.jp/puchiko_hp/
- panzoux memo (by panzoux) - http://panzoux.blogspot.jp/
- Project Dai3 Shougan / Sakuhin Line Up (by Teikoku) - http://t374724n.sakura.ne.jp/pro3quad/lineup3.html