牌九單機 - 牛牛牌九 (排九)
Red Koda Software Limited
網上牌九 - 牛牛牌九 2
Pai
Pai International electronics ltd
KK VPN
Tik VPN Studio
KK Comics
High Energy Comics
Gallery KK
Moblynx
KK Multimedya
Kartega Software and Consulting Inc.
澳門牌九
Justme Studio
天九至尊-連線牌九遊戲
Happysun Studio