Mubbashar (Hafiz Team)
A Guide to the Top Orthodox Christian Publishers in the Business
St. Vladimir's Seminary Press
Holy Trinity Publications
Ancient Faith Publishing
Conciliar Press
Light and Life Publishing
The Jordanville Prayer Book Press
SVS Press
The Bible Society of Egypt
Saint Tikhon's Seminary Press
Holy Cross Orthodox Press
Please note that the above list is not exhaustive and only represents a small sample of publishers in the field. Additionally, the list is based on my knowledge cutoff and there may be newer publishers and changes to the existing ones that I am not aware of.